Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1a6a82ad90a766…

MALICIOUS

PDF

73.2 KB Created: 2020-12-17 06:36:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d2cdf4986a2f5a91ae451b31141d29d7 SHA-1: 200471707e7ea8b48bb93a9555de3b1b1e02141c SHA-256: fe1a6a82ad90a7668b3aa84aaeee2c2266c76fa2faed98138c3d9740130b14d5
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. Another critical heuristic identified it as a PDF link farm, suggesting a deceptive purpose. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence point towards a phishing or malware distribution attempt.

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
  • 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://ggtraff.ru/aws?utm_term=t%25C3%25BCrkiye+klinikleri+journal+of+case+reports+index In PDF document text
    • https://cdn-cms.f-static.net/uploads/4498842/normal_5fda3b5566daf.pdfIn PDF document text
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/e292f9c23.pdfIn PDF document text
    • https://vezaxudikofexi.weebly.com/uploads/1/3/4/6/134654587/8b8e594cfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451742/normal_5fc80c669bac6.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/e57377f5-9135-4a4b-a02d-0da697741dbd/prire__sainte_rita_causes_dsespres.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36cac16f6d44b07cebbf4/t/5fcdc0bd83d2ac65cc3307ae/1607319742156/space_shooter_new_galaxy_attack_gift_code.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5947b0b6b03258f5520ec/t/5fcaea27a51c5a14019f4cf1/1607133735893/grab_food_driver_application.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/capteur_de_position.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc165fda8793968640bd5e7/t/5fc505c07acac6192a5f44e9/1606747585084/wunegusijilopeta.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/conceptual_physics_hewitt.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/1206862966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5dda97-2fef-41b3-8eb0-a9f7019c10f9/genome_mate_pro_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/sowikeledodigewipun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc549542e537a05ef25fbe0/t/5fc7ebe864cad75cc6ceb722/1606937578888/gezibofuludamajujunagarib.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_off0000ce72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE72 5412 bytes
SHA-256: 3dfadc3dcd2917422bd704572817de5ae6c4465ce7d63dc180de08ea11d90bf7
font_01_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 12356 bytes
SHA-256: 0e4d405855a28d45c4393e96bcd7355eb6d6a800a3b684c057863a408b67ca3a
font_02_sfnt_off0001076b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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