Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a6382a3611b1d7…

MALICIOUS

PDF

68.7 KB Created: 2020-11-09 17:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f175d227f87f8261786dadcf8ff20444 SHA-1: c468ba7e6db406a6a93af4b7072460a534ce191d SHA-256: 70a6382a3611b1d7dc17094a10df2e4b63d8649305938b522eb89daa46686ca1
216 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The presence of a password-protected archive lure suggests an attempt to bypass gateway security. While no scripts were directly extracted, the PDF structure and embedded URIs indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffnew.ru/aws?keyword=milford+wadleigh+memorial+library PDF link annotation
    • https://narebojabow.weebly.com/uploads/1/3/4/2/134266185/1849148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_5f985942a2736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8b5dc7388ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5f97831e2e310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f9a6a922a94a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f89e705ded03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f9acfb0b0b77.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/pefogotibisu_todarurako.pdfIn PDF document text
    • https://fukubumo.weebly.com/uploads/1/3/4/0/134016705/zulabupu-vogodoresonal-vanonitix-kevonikoran.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5fa0e85f03775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422390/normal_5f9a2cdc8d4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f9238eacaf7e.pdfIn PDF document text
    • https://fowexukemaxoz.weebly.com/uploads/1/3/4/3/134369940/4349856.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/ee336a12-cff5-46ab-b0b8-aefbe7723832/ligebuvetilatome.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_off0000cd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 5480 bytes
SHA-256: 0ae09f3ed3fa4e07dc58fac24484b3bb69f9db42b96036a4a4019e4bbc1c3627
font_01_sfnt_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 11052 bytes
SHA-256: 4c022a3e523d36c4cadf46df0df3f0ca1664fc04e514490f2d34e2768b5dec70

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