Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4bd2c1e12ea40e0…

MALICIOUS

PDF

88.9 KB Created: 2020-12-14 15:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c72f8c94aecb785fec0b493f7ef7eb0e SHA-1: b75aaece0bd8c872d0306e64022f7681786378ea SHA-256: a4bd2c1e12ea40e001ab73e5cf62e6c545d294b7cbae0981c53fef0030d8f795
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 as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or phishing lure, with one prominent URL being https://trafficel.ru/aws?utm_term=machine+learning+project+report+github. The document body is heavily obfuscated, but the presence of external links and the heuristic firings strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=machine+learning+project+report+github PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f9139cf42723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5fad506aba109.pdfIn PDF document text
    • https://titenukom.weebly.com/uploads/1/3/4/5/134523185/f913ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462708/normal_5fbe676049f64.pdfIn PDF document text
    • https://berosafeteroz.weebly.com/uploads/1/3/4/8/134885041/rajonesenit-jasuvodugizo.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/kilik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fd082dbe170e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4f30127a199023acf5c67/t/5fc669a11972c46e3c7a991d/1606838696038/saving_fish_from_drowning_writer_crossword_clue.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e80068612547ed5e2b99/t/5fc281e964571256548d56df/1606582761875/ziruzujevij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd258d2ae44b548da60dc2/1606231438407/west_haven_train_station_to_yankee_stadium.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdfb64ccd2b773201c6363/t/5fd602fd13a48350e80822e2/1607860991211/chrome_76_mac.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc542ce9698b02c7f3d61af/t/5fd5f39f9264095525c87ddc/1607857060844/android_ndk_directory_structure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe00f0e6d49a06bb578df6/1606287605508/unblocked_games_77_fnaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0867c7afe470b557e007/1606223983328/38656770181.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53b031c8c7413144e61dc/t/5fd7403cdca22152605d3d52/1607942205304/82852274285.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 5236 bytes
SHA-256: db4b95554076d8cf4838eee6388b6d34bb2b019309eb1a19f803e1f54692850c
font_01_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 10888 bytes
SHA-256: 0fb8a8ab6e02122bee431d3cdb72554203c993e4c9b920bc5086eacf3a8cbd87
font_03_sfnt_off000140b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B0 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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