Malicious PDF — malware analysis report

Static analysis result for SHA-256 60823e4e20f43f94…

MALICIOUS

PDF

65.2 KB Created: 2020-11-11 01:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b08980eeac61689a6a2ab78a1ec5bab9 SHA-1: 1a566539b1e23e6aea0858837e8f44982d2d2a8a SHA-256: 60823e4e20f43f949c1e0c1cae418f0a4209242f53ea96e731a791b83fb9d2b0
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a PDF redirector link to 'traffmen.ru'. Another critical heuristic identified a PDF link farm, with 'uploads.strikinglycdn.com' being the first URL in a list of 26 external links. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware distribution.

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
  • 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.
  • 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://traffmen.ru/aws?keyword=copy+and+paste+space+bar In PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/favodepoti_lorobepovanid.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/xusesixo.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/3e40ee2b3800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f964a5bc4372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9687d0-4bd4-43ba-b648-3adac1ea433a/belgian_malinois_for_sale_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/42220891696.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/26342646973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6140b8d-3b9a-4dd3-b1f4-292c47724e62/45662677656.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/21137941870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ae4612-1d1f-48d8-bd02-8a808c7be1b2/71144263349.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/81517757305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc85e9b-e218-4831-83aa-5fa366108f25/fofukunor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6872c8e-6aca-4760-92c6-93af86606201/37387549120.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_off0000c48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48A 5180 bytes
SHA-256: 766f27792571084387a9a2bc257c56cc70b7480901c038728eb587178675aa07
font_01_sfnt_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 10044 bytes
SHA-256: 6fb0bf6f405af00dd2c549ba9bcc7498d6d3c4b64d69b241d9db5df8405667c5

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