Malicious PDF — malware analysis report

Static analysis result for SHA-256 169360f5084193e4…

MALICIOUS

PDF

73.1 KB Created: 2021-09-04 04:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 68aeb2b09510b574aa1d5f6482692d17 SHA-1: c3a540cf5773f2e9ef659c46cc67d87d5042708e SHA-256: 169360f5084193e4845e3b1e025292d9b1dfcb53ed1373b5af9f9cffafa56c96
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to redirect users to malicious sites. The embedded JavaScript suggests an attempt to execute code, potentially for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://medvor.ru/uplcv?utm_term=programiz+python+pdf PDF link annotation
    • https://schmitz.cz/res/file/bidopojapubuxenajimew.pdfIn PDF document text
    • http://julianina.de/upload/file/28080898058.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/mkia5rhmgt2dq9voj1fg21ul0k/19746723601.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/17623540598.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/caac9cef7ea29463bf6b95732f2fcf25/zixewigudof.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/jaledubofesefowarulufume.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161275dd6ece49---48268934548.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/5748857886.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/86044795010.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/8526796484.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/23060673071.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/969701679.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/sadet.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ab24b24868f7661ad1b96ca358c9ff0c/67188813554.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/wakaxajejakus.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7d6acdc62---vidikunadefagube.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/5e0a6910115af7405afad0f60349bb78/javoxiketulur.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/tewusalexodekigarif.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/13161011849.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/50349689398.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/65034152370.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/06jjf1ln0opm2h0e3m0cgjara7/70817455937.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/54928436849.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716b8d958c6---724496971.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEB 15872 bytes
SHA-256: e4f05cc3f75f9fdaca44c2687a2785274e2784a18e0640f0622aaacdd4b7b24e
font_01_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 10772 bytes
SHA-256: 8d332185dba64177b70abb11b1a183a335e2bd7f1eeff2d760fcc36f3fbca114

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