Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c674012b939b201…

MALICIOUS

PDF

78.9 KB Created: 2020-11-11 11:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5a458609cd97a59df2f1dc0e291e3d1f SHA-1: d90a77deaa2b45abd334f87d619930148652b31d SHA-256: 5c674012b939b201dd60437d8c3725f948cdd6309d03943d828a2b0ace4fdb6b
164 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?keyword=minecraft+pe+apk+newest+version+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5fa35ec3ead59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5f974b2834be8.pdfIn PDF document text
    • https://sesizapilutib.weebly.com/uploads/1/3/4/2/134266568/3298601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5fa017fd3af1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5fab0e2091f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f8a6d197b287.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/vigagusutetewedimusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f922cbe7a19d.pdfIn PDF document text
    • https://keboxatoxumire.weebly.com/uploads/1/3/4/5/134591907/pojifumeletez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_5fa8d8a594394.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/6026554.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/1edc3764-13b9-4c45-8bb7-6d4126beffda/tor_apk_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cce84a90-a251-4283-ba80-0b614a9cee52/xalogigiwaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fc9f97a-8734-4059-9ce0-327ab2abdf7e/43815935016.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_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 5196 bytes
SHA-256: 30d0acfbf1c3fe28a00eda00cf49531021ab34ff13dbeccd08dad915988831a4
font_01_sfnt_off00010906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10906 10916 bytes
SHA-256: 846b5eb871d6445a2b4ef68a0e09dcfb2c24a943f2ce4d21859abbdc435cbfb4

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