Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f047af182a17ff…

MALICIOUS

PDF

74.6 KB Created: 2021-03-08 01:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 53203b59ed1550d2e7b320ebee017ee9 SHA-1: 75916de43abe5bf83d0d5734da8ffbae1ed1148c SHA-256: f0f047af182a17ff3e96a5aaaa23a7da7537c093772a2c1f494d369fe3bf91ca
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a phishing or malicious redirection attack, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=tuact+venom+x4+vs+xim+apex PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5fcf639ef17d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5feb2218e5d83.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/32189016082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409393/normal_5fd1c3944ee2b.pdfIn PDF document text
    • https://lidanoliki.weebly.com/uploads/1/3/1/3/131380598/f7fe4e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_6042fa8d95a3b.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/f7c8d9402d5e081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_602c250c8eec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_5fd0c12849005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489035/normal_601a2e5167796.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/how_to_write_a_chemistry_lab_conclusion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_6039a412cc9dd.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/56594385817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487432/normal_5ff51a5524768.pdfIn PDF document text
    • https://mefuwowenapes.weebly.com/uploads/1/3/4/6/134611128/tumokawaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427793/normal_603e9fc161410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_601eed2d61a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481993/normal_603ed0c195c1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458618/normal_5fd22e079a528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugufaza.myartsonline.com/5339874143.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/xukisofulusopufuti.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_off0000e7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EB 5116 bytes
SHA-256: f7618a0ca4dfbfd0f836817d668b0c3f97435c91cf21970ea3f3510503c6bea8
font_01_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 10612 bytes
SHA-256: 0b72e77cce3a58371e6b87bccc8320853490d098864d14f53211c5c1c4b0e24f

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