Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42451affe344c2e…

MALICIOUS

PDF

74.5 KB Created: 2021-06-03 01:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 553f20fc308b51456974f0a910687d8a SHA-1: dd93f0c04f220e7762a1d96eaad59a31347ca615 SHA-256: f42451affe344c2e279a3f8ae4dd29b7803158f7d89cb91b0498a6f527de3fb4
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 0.9997

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://ponafet.ru/123?utm_term=rough+collie+dog+breed+information PDF link annotation
    • https://paxedobopesenun.weebly.com/uploads/1/3/1/3/131398064/dorowazuvisaliturade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_6053a1ff7cdc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60600d902cee0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_601548ac9678f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_6035508e99578.pdfIn PDF document text
    • https://girosunemakafe.weebly.com/uploads/1/3/0/7/130739351/54391ecd5.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4414176/normal_60b3cb498118f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5ff50d8262867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_603ee00724669.pdfIn PDF document text
    • https://jeluvumo.weebly.com/uploads/1/3/4/4/134492882/94e1be77f5.pdfIn PDF document text
    • https://xebutikud.weebly.com/uploads/1/3/0/8/130813588/kofominitofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_5fda3ded9f47a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_5fdbde2791e3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144520872/how_to_use_ip_stresser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fea7ff-ec83-49f9-bd29-47ae426c4ae2/what_is_the_structure_of_a_book_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306d42bf-45a1-463a-bdcb-7aee23de79c3/the_wheel_of_time_book_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0ee214-5e17-4e24-9dc8-84c1eedf586a/26837819024.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144412830/75855905374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/000517f1-84e8-4c4c-80a0-84bd79eb6d1d/54588613361.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144421659/can_i_get_a_full_body_scan_for_cancer.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/dicionario_hebraico_portugues_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 5404 bytes
SHA-256: 3b24abb73e2cfa64c85c769cd6a63632ade37a0758913f275108b061ef007f6f
font_01_sfnt_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 10892 bytes
SHA-256: 76b78165f594a96aebbe9eaf317baedbf746aa3db473e0bcedbb7eb3786094c3

Open this report in the interactive analyzer, or submit your own file for analysis.