Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e40ff634599048…

MALICIOUS

PDF

66.7 KB Created: 2020-11-19 05:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 89ef5fcd1f3c4ec1cdded8b27289938d SHA-1: b4f99263454b9e5d191d6dcbfada81de81cfd402 SHA-256: a6e40ff63459904844a417cde8133981679c153975dd26fb673c072a6fa0cf1b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The primary URL, "https://traffnew.ru/123?utm_term=the+simpsons+apk+mod+ios", appears to be a lure for potentially unwanted software.

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
  • 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.
  • 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/123?utm_term=the+simpsons+apk+mod+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476010/normal_5fa57211cddd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f872e9015eac.pdfIn PDF document text
    • https://sobanuwutotamiw.weebly.com/uploads/1/3/4/1/134131644/783861b7caf46.pdfIn PDF document text
    • https://zikavudosun.weebly.com/uploads/1/3/4/3/134329779/5a1c6fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f9ca160619cd.pdfIn PDF document text
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/2532805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f87b9ca014f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5f92433de0490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fa234167a86b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5f9921186fcd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f8f20c905707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5fa514b3bd125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f8763051af44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f875e4dbec9a.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/6e3a7c4866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5fb56d2597c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421781/normal_5f9757a0a9fca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80D 5084 bytes
SHA-256: 103d08d2b2120cf57c3bacdec9c471615cf06a55ed99b084f5939abae323f005
font_01_sfnt_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 10768 bytes
SHA-256: 775ba52aac59ab586056a021115652481acddf860ba13544d3b4dcd6cf631c54

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