Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e3c38dd462815b…

MALICIOUS

PDF

90.8 KB Created: 2021-03-23 00:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 66053f80dbf629da24d518ba3686ab20 SHA-1: 54d0404f11f06a879664c0d8fa051605391ac9e8 SHA-256: b2e3c38dd462815b21431e9dc139e993f6e08fc99de047699073f7b4a4aff103
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The embedded URLs and the PDF structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/aws?utm_term=minoan+snake+goddess+style+and+category PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496402/normal_5ffbb3f183673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_60316fdc8645c.pdfIn PDF document text
    • https://vitafidazi.weebly.com/uploads/1/3/4/7/134728623/xiwuxadim-potorivut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480756/normal_5ff1aefb5e38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_600e2742c8144.pdfIn PDF document text
    • https://velelamoju.weebly.com/uploads/1/3/1/4/131438442/fixavapelor.pdfIn PDF document text
    • https://gulikefesagigal.weebly.com/uploads/1/3/5/3/135303577/nalulujexuwom.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/6758714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_602b511b81212.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/3371449.pdfIn PDF document text
    • https://sulogaxelope.weebly.com/uploads/1/3/1/4/131438888/xawidema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484126/normal_5ff2d6e84e989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_5fedfb25b9233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_6033ba8b0fe7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408721/normal_60381327da8bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_6012165d022b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_605884dc75513.pdfIn PDF document text
    • https://wolafufep.weebly.com/uploads/1/3/5/3/135305459/6328238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/how_to_study_medical_biochemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/gajapuveralaboranozaja.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/makaputemunupitu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/future_tense_will_going_to_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/convert_kwh_m2_day_to_w_m2.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_off000123c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C4 5276 bytes
SHA-256: 13711471a92bc342dff13bef1600be34f44a5ed77399bb54573bedd88289e934
font_01_sfnt_off000135dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DD 12132 bytes
SHA-256: db604113b8cf2e2a76b868662e344df04edb3ec0ff0c2732d1c63dc08b1579e2