Malicious PDF — malware analysis report

Static analysis result for SHA-256 29938024b8cbeb11…

MALICIOUS

PDF

83.9 KB Created: 2021-03-17 06:11:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cc30295c5c43fdc2a057047d6241621a SHA-1: 151e3b910a1b0241fc6ca01d9d2093739a66c17d SHA-256: 29938024b8cbeb11991e824cc532b963e143403400ef685d2649c2f8928c4719
186 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 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=can%2527t+help+falling+in+love+piano+easy PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5fc67e6cb7506.pdfIn PDF document text
    • http://silekutum.medianewsonline.com/what_age_rating_is_world_war_z_2.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/tugamisov.pdfIn PDF document text
    • http://tinubawolu.mywebcommunity.org/skf_needle_bearing_catalog.pdfIn PDF document text
    • https://talovilivakalod.weebly.com/uploads/1/3/5/3/135326419/7225949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_601c5b85a0983.pdfIn PDF document text
    • https://zudamuberul.weebly.com/uploads/1/3/4/8/134854759/9042138.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/6942b432-b8e5-467c-b27d-1f50fdb56076/thetford_rv_toilet_bowl_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2064a955-80c1-47c8-a87f-6a82b1fb63cf/dabuma.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/36389852634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015c7437-ec83-4bdb-83fb-335fec366d41/dizofuruwebugobuludomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde4eabf-8696-4830-aec0-f4fedfcfdd99/33332087242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3f9e08-04ff-44fd-9ea7-26bf16725801/john_deere_lt160_parts_ebay.pdfIn PDF document text
    • http://widifusi.myartsonline.com/a_dictionary_of_chinese_symbols.pdfIn PDF document text
    • http://zulolabopel.myartsonline.com/vikijikepalujerop.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/47956630827.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/how_to_wear_earbuds_with_tragus_piercing.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_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 5168 bytes
SHA-256: e17a60f0e2cba1b9e28a6827552bb9742ab7535c2b20253c570624a7cef2f0a6
font_01_sfnt_off00011a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A97 11648 bytes
SHA-256: f4f1f009ea51f9e896673eeae4a4f7ae4f321af775d598a5e0565c6cdcc0c161

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