Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80855fdd60a54d0…

MALICIOUS

PDF

69.6 KB Created: 2020-12-18 15:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a5e322c9b7c345fd81f8a8eda86c6621 SHA-1: 010e81ee895651b66bcd9cecc4af4d55eed01577 SHA-256: c80855fdd60a54d0fb275fc521ec6e084f19895aaf4197d456d0107669538f59
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffi.ru/123?utm_term=dayton+electric+unit+heater+manual PDF link annotation
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/dopusikezos.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/wetevadabaguko.pdfIn PDF document text
    • https://sutukedepebovi.weebly.com/uploads/1/3/4/7/134753024/1105004.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://static1.squarespace.com/static/5fc79742fa9ecc3978a04d57/t/5fcafb9c85bc3a28a6023024/1607138204275/podcast_app_mac_os.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/virtual_stock_market_app_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78a98bcf5f06bcb796135/t/5fcc629c1e1a4d7de1219ae0/1607230115107/purin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae9e6a2-17ac-4cc5-9d3a-bbc8258a4a1f/50813494298.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd131452f90b7fe52ecb/t/5fc13efe3485235c86f46f52/1606500098270/16734658621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/166a42e5-f74b-456f-b765-0b3bced21e72/betalabe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d442e9fc3622d52eb2cd/t/5fc4f728145a8629dc4c86de/1606743850137/legarifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dc4953-0036-49ca-a64f-9a6125897b8f/hack_gu_vol_3_forest_of_pain_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f32f0d-17cd-4f66-8c8d-880b35890544/nomonasopinepun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112aed26ff1194f74a888/t/5fc478c84f983757206ed80e/1606711497069/mjoll_the_lioness_steward.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000d1d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD1D2 23304 bytes
SHA-256: 9dfa612db72e2acc251ab88f93c3606e7d1ffa72e3848368b354e78768bc8041
font_00_sfnt_off0000a680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA680 4844 bytes
SHA-256: 448949d69e7892f05c7cbf4d5e3cbad566fe6b24be5ce5efce930fe59900100a
font_01_sfnt_off0000b6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C9 7888 bytes
SHA-256: cfa8a2024824f1c0c6599e400d20c548d10b584b306e82e538bf26d3d3c39806
font_03_sfnt_off0000fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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