Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4ee8071be59618…

MALICIOUS

PDF

69.6 KB Created: 2020-12-18 08:32:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cb4033332f96141c0d01b6c30c1b21ce SHA-1: 3691977fb63587dadf352ebc8e35e80d32b99507 SHA-256: bf4ee8071be59618dc6ef542b14effa90aa1210a659cfbd6c4c0d586ded13282
214 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a "Patagonia case study free pdf". The presence of a ClamAV detection for Pdf.Phishing.Trojan and ML classification further support its malicious nature, likely as a phishing or redirection attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=patagonia+case+study+free+pdf In PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/5d4439.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/kavitokolezub/44840004912.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/limafanexuxonotum.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/lumapipezevuxixikafute.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/new_animated_movies_2018_full.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59da3bf71053ccb2fc112/t/5fd165fec10336458b2a1fff/1607558655213/85356708655.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/durirewasisejiribo.pdfIn PDF document text
    • https://s3.amazonaws.com/rasegawi/8607785783.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/37145286031.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58b7f104edf1d77a09da7/t/5fce6c3ad235d37878fbc1cc/1607363643217/steel_and_flesh_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/password_keeper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/44764497288.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_off0000c542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 5276 bytes
SHA-256: e80f0eb583ebbe745f3f6573168b424a0b2942c342e2dc0d1c8f2db8e1d42b3c
font_01_sfnt_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 10756 bytes
SHA-256: 58019ff6468ad9bf71e09f020f3d035ccc75e60a91bfe207126888bc2c3198d0
font_02_sfnt_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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