Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d6cbdd13c32ab8…

MALICIOUS

PDF

95.2 KB Created: 2021-06-28 11:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e1b3d055a0988ed2e0b8d4f0b629cf41 SHA-1: e5d172c067d5f3b18129d29deea4434ff98c6b57 SHA-256: a7d6cbdd13c32ab886c74f13e56ae662278e32893b2c1e7c123e7405b6ea16b9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate that the PDF is part of a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute phishing content or malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://pphjako.pl/userfiles/file/gabezujawijejoga.pdf In PDF document text
    • http://provia-events.de/pics/fotos/1/file/96595675221.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e0fa8f0c---vomajuvoraxukisex.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/53304297493.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7be4b5d7e8ed3b7961c461013d61e318/90511245761.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/a7123056d20926aeb265b310774e9432/gepexasovijalawafu.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/84659608184.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d5531a95---lizijodizoperuwe.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/68117095299.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/e34d3c131fc80b0e110bd6b73784790c/pavokiliputaderoxesi.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/dc202ae0056b5a222b69c88e221c2147/51413363126.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/liwif.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaa1aee676---rukuva.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2271c1651a1d6a41e288a9be8df484fd/lowazalamejexufol.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/46b98c895fce4bac5b61bea0d92e11cf/sipolozavijatat.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/sikatufoze.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/zalajasolojuzenoruro.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1n58lrmkk028i3v059epvt93ki/46571719623.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/bonoxo.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/xuvesupepowutimemanupo.pdfIn PDF document text
    • http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/gevaropusurutixuko.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0273d47fef---39876313393.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/j2imm3qsr9eam6664dpgt01fq4/34160069294.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d2879223cc30d1c8e54c0c150f24907/fifog.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/52458178037.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00826dee54---40612666502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=one+apus+container+shipPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f28e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF28E 18192 bytes
SHA-256: 6e46cc73f54c34e2d37436d0d95d704099af1830735fe86bf28ab6e95f26e77a
font_01_sfnt_off00010f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12773 10548 bytes
SHA-256: 0616d3b203adda7bdeaac94f6a421b007549b09b1aebc284ad08dcb6449b18e0
font_03_sfnt_off00013f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7F 18072 bytes
SHA-256: 758f928cc22ca4182a70fb81346708c3a9e40672428f2b88e0c0ed36711b72a2

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