Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac0f35f0135c2b6…

MALICIOUS

PDF

88.6 KB Created: 2021-01-12 11:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e148a0b3bde3e0f71e0d3a071d145d12 SHA-1: 1d32547de9d95df31c17acaa68daad6c52df3c85 SHA-256: 3ac0f35f0135c2b68548510246777ce28d2402a4e31f48c0aa991f754ff899e4
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL associated with software downloads, suggesting a phishing or malware distribution lure. The presence of a 'Download Now' heuristic further supports this. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=logitech+mx+anywhere+2s+software PDF link annotation
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/5ccb613346cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390071/normal_5fb33e74dde9f.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/jfm1cM3/retroarch_xbox_360_controller_not_configured.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/d71e02f0f50f3a.pdfIn PDF document text
    • https://gazitagoro.weebly.com/uploads/1/3/4/0/134016873/9239232.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/ahb6jis/89823311227.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/ToqOiaQ/shoot_the_apple_online_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476443/normal_5fcb72b6a9608.pdfIn PDF document text
    • https://site-1168287.mozfiles.com/files/1168287/school_report_writing_format.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/bopuxosavubare/mechanism_of_symbiotic_nitrogen_fixation.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/lunigodevogikavew.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/chromium_os_builds_by_hexxeh.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/report_header_and_footer_definition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A8 17064 bytes
SHA-256: ade2ab789a13962e6058fac490319efaa5a5690f070036e72657ce65a929ffae
font_01_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 5600 bytes
SHA-256: 298094bca9ebbcd326edcb0303591317a2cccb9c7f564c1020959e342d4e34ef
font_02_sfnt_off00012c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8E 11256 bytes
SHA-256: 5fd8f9441bbfce009f7dd0f51d5a3e992b65031ad98ede782fc3b113c2640c4e

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