Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f569f86f5c74f9…

MALICIOUS

PDF

74.3 KB Created: 2020-12-25 22:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a9dac70dd4ce653c9a6a5422476c1950 SHA-1: 00cfdaa7185dc35d8e81e83a53e571b32dacc643 SHA-256: 40f569f86f5c74f90253263c0c822f9ae14447519eea78024414793cacce6f90
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 0.9998

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
  • 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://traffnew.ru/aws?utm_term=chicago+bears+injury+report+week+3 PDF link annotation
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/2081150.pdfIn PDF document text
    • https://rujasuxok.weebly.com/uploads/1/3/1/6/131606047/sigemusununaz-tabajirexufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453914/normal_5fd88a3a9a837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fe2e13dac7cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/941977a5-de67-489c-b624-d36a1561e285/wutoxanito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdbd47a-80ee-4a93-b46c-c7340f80a1a2/lgbtqiapkah_full_acronym_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2178013-30f2-4500-91b9-9f4891f4c251/64263338581.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/nekigalumafobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba2e6c6-3a53-4859-b695-2fd129717007/darokeligokebobezorumix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f576fa3-e205-448d-bbd8-f3ec7eb325d5/49576225224.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/canon_sl2_manual_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6807c7-b3d7-45a4-803b-08c13a81d3a2/tesebutadolovival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f6ea6c-9f24-4516-b233-71e88184c297/koi_to_senkyo_to_chocolate_download.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5708 bytes
SHA-256: 46717de3b3e6b0f46fd8ba99e946e927c46e001c2fd2ad9ee113fdad44c29036
font_01_sfnt_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 11832 bytes
SHA-256: 0bfd715e2374fa55cf045596f473c66a6bad93c5a234f4995ed9e5cc6dd11adb

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