Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3873100dba0f65…

MALICIOUS

PDF

85.2 KB Created: 2021-01-08 08:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a07631c9870397b03c8f0726fd2220cf SHA-1: e89b5b5866ea066c591a23bc3fc5733912873a8b SHA-256: 9d3873100dba0f6576b191a4176353235b1c266361b9c5e0b3cfb754e09f2907
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=half+life+2+ep+2+achievement+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f880da09a4e4.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/7696989.pdfIn PDF document text
    • https://vezikiga.weebly.com/uploads/1/3/0/7/130739663/vozupowef-kuwife.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/hfQgjhb/lameditaturiwumuwikax.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/2gecjgO/vitub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5fa957657e9ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_5fe9aa849b696.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/eb328ba7-cc99-4599-9fc3-17c1ed4a7e29/proceso_de_fresado.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/laretuxiginite.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/10875971801.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/freeze_12_freon_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/donovon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb8adf2-0b0d-448b-b3db-030bb52036a3/89404004773.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/88260179507.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/pilot_grove_c_4_high_school.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_off00011095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11095 5448 bytes
SHA-256: 54b9df0b8733e6e554bf42ed05e4c7270efb7b2f314ed4df180f03b78334bd38
font_01_sfnt_off00012307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12307 10872 bytes
SHA-256: a108a18f2ff59826356184a1ab8fa5eb2c9158d66b82c9690988028c4a4a1371

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