Malicious PDF — malware analysis report

Static analysis result for SHA-256 54506527f88099c5…

MALICIOUS

PDF

86.2 KB Created: 2021-03-10 04:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 962d9d2808869f0631f67e7e547dfa65 SHA-1: 930c639b95b290eafdefaf6e5f51811e7da420bf SHA-256: 54506527f88099c557bd8cd35bace7379537d1a7b4105b3aa02ac8542edb14ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://fokemale.ru/strik?utm_term=all+the+bright+places+quotes+and+pages PDF link annotation
    • http://uplrezina.site/betodekuwuh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_60135b774059f.pdfIn PDF document text
    • http://bixifofagowezi.22web.org/26635460188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476001/normal_6009780916553.pdfIn PDF document text
    • https://mojurakikaluno.weebly.com/uploads/1/3/1/4/131438245/bowuzaruxu-gupajusatu-nijaxob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_602b229616e20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427104/normal_6008e2676f5de.pdfIn PDF document text
    • http://liketsven.xyz/30184686555t8waw.pdfIn PDF document text
    • http://upgrade4me.com/12426208133ox2un.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fdc1aed7f4d9.pdfIn PDF document text
    • http://3203epworthcres.com/21386320922wuw0i.pdfIn PDF document text
    • https://pesosetolumejaw.weebly.com/uploads/1/3/6/0/136094132/6260715.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/8312b7f0-cd14-4920-b222-dc31718b862b/3129878486.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_b0a88592500d4b6490d798e466de9476.pdf?index=trueIn PDF document text
    • http://sudemididesiz.epizy.com/6427221279.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_e1fe4edd10544f29bf41a1647a834388.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17dc03b-5d86-45c2-8505-be41eb64d04c/jowunavekirijulofuxojej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9c7715-7447-42ca-9463-5f07e5a9f8d3/tm-ac1900_default_login.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_0188810cae844167a4b9a7011dd3bca9.pdf?index=trueIn PDF document text
    • http://kelutezawixe.epizy.com/50775916213.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A2 5588 bytes
SHA-256: 32f723ead59c32e10864752eb22bd152e3e7af8f720f743667ccbf3d4f7759d9
font_01_sfnt_off0001268d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268D 10840 bytes
SHA-256: b679fb720933435ea70fcb5d110f962a85b1f756772127a2a7662ce1afdcb7aa

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