Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2720a410f3748e…

MALICIOUS

PDF

80.1 KB Created: 2021-01-06 20:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c3e3d1c4e6d3a1beba5daa7f962358a0 SHA-1: fee71cda9eade3c497b0cd66a4542cfd7faa669a SHA-256: ed2720a410f3748e3a1ba47687aa099676f9473bea651c008b0f0300452ee657
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The primary lure appears to be "best meme valentines cards", aiming to trick users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=best+meme+valentines+cards PDF link annotation
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/43f49c60027f.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/2378443.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/mimodamijuxoxe.pdfIn PDF document text
    • https://xewaxamuroz.weebly.com/uploads/1/3/4/5/134529724/e1108.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/wiregekufid.pdfIn PDF document text
    • https://sajepenimeb.weebly.com/uploads/1/3/4/3/134368310/mazepatoruwelowu.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/PDhch8e/sim_card_information_transfer.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/3092939.pdfIn PDF document text
    • https://zabamaki.weebly.com/uploads/1/3/4/8/134849969/b670c5edf.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/4878287.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/nibyKhg/disneyland_park_paris_map.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/jiggfhb/my_first_words.pdfIn PDF document text
    • https://kixumiziri.weebly.com/uploads/1/3/2/6/132681985/repililovedotuk-nugalu.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/cd3f66b2-fa19-494a-bffc-19b8dce53d26/48634867310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f362a62-3319-49ec-9602-3924f6669e9a/ap_world_history_princeton_review_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5196 bytes
SHA-256: 488945bf2efca0a62337b30b7f8b0fe3c86818297b3452e9cc00226663d7d5a5
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 10852 bytes
SHA-256: a6623df64d929e08e916f611bf431c295e97b88bd96db2d9da3c0d99761e2880
font_02_sfnt_off00011dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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