Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3e735adf914ad5…

MALICIOUS

PDF

89.9 KB Created: 2021-01-01 04:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 965dbc16999d6166db96acacafa02898 SHA-1: 9b555ce578da3ed78cfc157028d8c2be0381f449 SHA-256: 0f3e735adf914ad51cfa960f3a82a9a918f851303ecb0f8da1c9d65f861e37d8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://trafftec.ru/strik?utm_term=bright+falling+star+tonight PDF link annotation
    • https://cdn.sqhk.co/lisesemafo/jc7ie8B/bolatomulisototidegopul.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/egcggV8/ikea_brimnes_nightstand_assembly.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/Jlzcqgd/rotopinakerujizegono.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5fe0b3f4e9352.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/L9fjeFH/rode_videomic_pro_plus_vs_ntg.pdfIn PDF document text
    • https://loxuvozuru.weebly.com/uploads/1/3/4/7/134728716/6750797.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/jddwjdP/text_message_tones_iphone.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/rotupetawapusax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fe290112d4d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423453/normal_5fdf3445b5bea.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/ghijIZ5/ravensburger_puzzles_kidstuff.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/hbIjjhh/mazerimorumi.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/pomaxa/tamil_movie_link_telegram.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/darkrunner_guide_archeage.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/32288854012.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_off00011ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 5076 bytes
SHA-256: 3dac0aaa8be9a078913a71a28fa4491bfc99732783340e77ee9791c3d583b9db
font_01_sfnt_off00013135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13135 12260 bytes
SHA-256: 6d05f2353b9d32808e1b6b020d96146f742a6394e85732b8c6a21c3efc8469c2

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