Malicious PDF — malware analysis report

Static analysis result for SHA-256 7725a121dc841cda…

MALICIOUS

PDF

65.0 KB Created: 2020-11-24 06:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4aabb125fa4a12bcfa86f877b35a9c85 SHA-1: 0680776d985be559c5c7ad25f46d999bf405c907 SHA-256: 7725a121dc841cdafe4197be30ff53e42a177b3914bb7bd9ad0a4fab2cd06fae
214 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, characteristic of a link farm designed to redirect users to malicious sites. The primary redirector URL, 'https://ggtraff.ru/aws?utm_term=android+apps+play+store+free', suggests a lure related to free Android apps. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for 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://ggtraff.ru/aws?utm_term=android+apps+play+store+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f950204d234b.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/funav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5fa08f6199c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f93258529bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446774/normal_5fa23b76a449b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f8bb02ca44b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f9bb41819e64.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/11cfb56f821c652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5f92ed30d2c5d.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/aff6ce16-6b88-4491-9b04-1a4276159fdb/monster_hunter_world_weapon_tier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bb6530-a6d1-4d95-beaf-44860628a551/16171222116.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_off0000c23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23C 5128 bytes
SHA-256: 1f6a486345215714ac73482e7d75a007c2309679bd096571bef993d93e2e54c3
font_01_sfnt_off0000d3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 10588 bytes
SHA-256: a95e151cd7167c1320896f1c3240a081fc8e4113e6a6036646e1b16a4fdd951e

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