Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d6ce28f059a81e…

MALICIOUS

PDF

70.3 KB Created: 2021-09-25 14:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1b373980be57df3a78b3f9ac875c00ed SHA-1: 914f483fc93f74a7dccb93eb940af4c333ea53b9 SHA-256: 00d6ce28f059a81eabc1fc7d8b15546a5c31d0912f57d7946a4f72f4841cc2ca
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://coretry.ru/uplcv?utm_term=set+messaging+as+your+default+sms+texting+app+to+be+able+to+use+blacklist PDF link annotation
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/dosila.pdfIn PDF document text
    • https://pixel.bg/img/file/17140228180.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/ripanejutijobuvenel.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161308f93a59fd---37127281867.pdfIn PDF document text
    • http://vinhosnorte.com/images/files/xoresidakuzu.pdfIn PDF document text
    • http://www.grifin.sk/files/pafuxonotot.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132247b1a80b---lojazifipijikezotapurixe.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/zodezezaxuz.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/xelipexerawenogafazoril.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/61958609931.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/xadepaxiz.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/82742143004.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/73986081274.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/79103846667.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/dugotorowubatakalive.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/75386688356.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/6049365631.pdfIn PDF document text
    • http://zoop-tech.com/ckfinder/userfiles/files/nulobelalonemamo.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7baef1425---48656302067.pdfIn PDF document text
    • http://fatename.com/uploads/files/202109231935238831.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/mowofuxi.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109120458377404.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/34315971050.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_off0000ae54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE54 15444 bytes
SHA-256: 8675b5e26f1774bf197d0cd567199772ae8e6116e0869b03c2ef1d830b24b4f4
font_01_sfnt_off0000d58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 11584 bytes
SHA-256: e75ab76923078f0be798e99886d89bc071c148b429941be9f8d1b32998f71b93

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