Malicious PDF — malware analysis report

Static analysis result for SHA-256 299df5a709168772…

MALICIOUS

PDF

64.1 KB Created: 2020-12-15 21:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d56c8ade3ba186bcd245dcd92511f6c1 SHA-1: 0be6369a7edf53f4dba606e32617bd236c41a5d1 SHA-256: 299df5a7091687724746664c3c793f4405337afc4c8a2f746bba84b72be6aa37
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://traffking.ru/123?utm_term=stihl+024+av+manual', is a primary indicator of malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=stihl+024+av+manual PDF link annotation
    • https://femodufawo.weebly.com/uploads/1/3/4/3/134317846/9013083.pdfIn PDF document text
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/4817679.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/5975077.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.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://uploads.strikinglycdn.com/files/f6f6c0d8-8aa2-4268-9697-baf2933609a2/64188714206.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/aptos_middle_school_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b29374f-bb48-49b9-a6e4-0567b5af1561/research_methods_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2ee818-82a7-4510-8c2b-0dde123da329/gupefiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10412b7b-77c3-439e-ac0c-61a41e1bd53b/paypal_hack_legit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccce647-3088-4acf-99a2-f4247e740697/gokawuxadowotasipiruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab978172-3d81-4d50-bad4-9382d47ca68b/46337846788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26347a9c-2317-4a83-abbf-48ecfa399b95/gafesadone.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_off0000b434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB434 4828 bytes
SHA-256: 4d89c2f312812193c572ba35e83943079350db95db6469e078a54b53ec8bcdf0
font_01_sfnt_off0000c46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46D 9856 bytes
SHA-256: 395790a962f0ed296492ce54f391cc39f329a132836d9c6eddcd8706c83c66cd
font_02_sfnt_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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