Malicious PDF — malware analysis report

Static analysis result for SHA-256 46470abff693c5a7…

MALICIOUS

PDF

70.9 KB Created: 2020-12-24 07:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 89e175dd621bb353629a2e15e5c1e88c SHA-1: bb0b7ed18f34c8fddbcbf8a251e52af1099d7a30 SHA-256: 46470abff693c5a79ad04cd550b31f4ac57563cc907f53b704dd75e00ab86c65
274 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link and a brand-impersonation credential phishing lure for LinkedIn. It also includes a large number of external PDF links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gubojipupulep.weebly.com/uploads/1/3/4/3/134359502/30940f.pdf.
  • 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://gettraff.ru/aws?utm_term=ecological+succession+quiz+answer+key In PDF document text
    • https://gubojipupulep.weebly.com/uploads/1/3/4/3/134359502/30940f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_5fa1950fa6735.pdfIn PDF document text
    • https://cdn.sqhk.co/vawikepaf/ggmibgc/59401530063.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolosew/gbjgjh4/clash_of_clans_zombie_mod_apkpure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/25cf0d90-ff38-46fe-aff3-6f0b8ac37682/kubeduvegalagezaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9751bc-3cab-499e-a415-718aaa0cee1f/cra-z-art_nickelodeon_slime_kit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61f2f06-4d44-4565-8105-3685787b60a9/superman_belt_buckel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dcd5d47-71d7-4695-905f-c68e084f4bba/video_2_mp3_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bbdfab2-0563-4125-a9a3-2173f375b5fa/42713008284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d06e66-02b9-42e5-86a2-8bd44a323840/lipoma_removal_surgery_covered_by_insurance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5199546-28bf-4853-ad1e-b49d517f03b3/gujizaxugamifapiwegejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602d80c9-3fa7-47b8-b89b-f9206ec18a97/36699217649.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_off0000c9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CC 5160 bytes
SHA-256: 5905fd925aed24b1ee54b893bc5bd100d9a7f46f48dc3ea97573dcae37e01f1c
font_01_sfnt_off0000db7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7D 10888 bytes
SHA-256: b4101590ff21fc5a6d23d1fefcd1e1e243e1feb87ebd6abecf260f525dba2171
font_02_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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