Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d8ba25df26b593…

MALICIOUS

PDF

75.6 KB Created: 2021-01-03 05:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d8823733a9b7c97fd33b6ad1403c43be SHA-1: ee5c0066709f01111eae8a11e710a9c5a6d73a00 SHA-256: 29d8ba25df26b593fe913fa1e662811eb32096f121befd349186986f2814c713
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 ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The document contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO spam tactic. The primary URL, 'https://trafftec.ru/123?utm_term=how+to+join+a+google+group+with+outlook', is likely used to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=how+to+join+a+google+group+with+outlook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f93c24c46705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5fccbf28f0999.pdfIn PDF document text
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/78e44.pdfIn PDF document text
    • https://cdn.sqhk.co/midubevine/Fhijgb3/ps4_remote_play_controller_not_working_android.pdfIn PDF document text
    • https://xezajorawelo.weebly.com/uploads/1/3/1/4/131408008/71714ae68a6b.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/b3bc62a.pdfIn PDF document text
    • https://nugekowu.weebly.com/uploads/1/3/4/5/134587082/13cf861.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nefunupu/fuxajorukasitifozojujizi.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/silverlight_for_ipad_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/11137186474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fcb416-e7ee-4179-8fad-d83c89cde110/pusena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdc5e28-4671-4735-bc68-fc378b00e4c6/97561983247.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/warodavefel.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/70538110028.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 4980 bytes
SHA-256: c5ed18948f4495b935864e601293edc978e192d9b6a5c797624c46d4686a7838
font_01_sfnt_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 11156 bytes
SHA-256: acf0d5a51cbe694d7ac003b56918c0575b19a76f5ac4f6b680206e437b37fced
font_02_sfnt_off0001134a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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