Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2c6fb5215029d1…

MALICIOUS

PDF

64.5 KB Created: 2021-01-03 04:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: de8bbe38ee5b3f66e468216e5d36493e SHA-1: ac667f0e724fd110b0aee18c652c227d76417fa2 SHA-256: 6d2c6fb5215029d1348dbed6e2cda2695963e86ef4ee83047837bb0f6f324fb0
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/aws?utm_term=gift+voucher+design+template PDF link annotation
    • https://cdn.sqhk.co/rawegili/egf8ggK/t_i_auto_click_2020_ios.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/pebawad.pdfIn PDF document text
    • https://sawalodisixujig.weebly.com/uploads/1/3/4/4/134490012/vewewiwapasewivaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_5faf908a0a70a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366647/normal_5fe3bda023fb7.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/gYx3hiN/ice_cream_maker_cuisinart_recipe.pdfIn PDF document text
    • https://jabezenenadako.weebly.com/uploads/1/3/4/2/134234778/woliguluziduvi.pdfIn PDF document text
    • https://bobenetawif.weebly.com/uploads/1/3/4/6/134666578/luzitonaman-gilobevek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f8f062a67e23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sixolose/92489794987.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/58052724108.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/41090806244.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/equivalent_fractions_using_fraction_wall_worksheet.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC7 5660 bytes
SHA-256: 30d5f75444ccb47eb8f565b497090fc6224bd4299d7ffeb6ba05f621e8c22bec
font_01_sfnt_off0000d1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EB 10264 bytes
SHA-256: 9f5831957bba25eb5b86a07b06cb8759fd019d5a65cd5ff11a96b787b3bce63f