Malicious PDF — malware analysis report

Static analysis result for SHA-256 0838217c446dbea5…

MALICIOUS

PDF

73.9 KB Created: 2021-03-15 17:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: be4ccb29f290cbf55a4e3a0c11a42022 SHA-1: 5b7f3589ecfcd41be58119e543f559982a7bbbef SHA-256: 0838217c446dbea502782bc195b5a78baea184d0239a9546631e2652c975e00c
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://dafemum.ru/award?keyword=novel+defeated+by+love+pdf PDF link annotation
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/1768923.pdfIn PDF document text
    • http://freshka.fun/devi_bhagavatam_telugu_book_free_downloadeyhxo.pdfIn PDF document text
    • https://xizidedatisaxos.weebly.com/uploads/1/3/2/3/132303240/2820803.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/kebisulujis.pdfIn PDF document text
    • http://salonapp.xyz/95434608813fpg29.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/denuledoluledi-tazikoxikenifup-nukowabedurex.pdfIn PDF document text
    • https://virefogagivagu.weebly.com/uploads/1/3/0/8/130815228/ad8761bc8b.pdfIn PDF document text
    • http://meetporte.xyz/megazaxidao4e6s.pdfIn PDF document text
    • https://soxopumejujaru.weebly.com/uploads/1/3/4/1/134108815/6cfbabda301ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_6002d29b55bbb.pdfIn PDF document text
    • http://trujillostacoshop.com/79632665697u7uc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_600e0d02c11fc.pdfIn PDF document text
    • http://bit7.top/best_android_one_phone_2019_uk9f7s2.pdfIn PDF document text
    • http://vereffka.xyz/dirodivirabamopewinakdhdg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/tivekofumab.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/gerularulomosijogo.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/github_markdown_emoji_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/22025462601.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/julius_caesar_by_william_shakespeare.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_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 5032 bytes
SHA-256: e59bda057a6ad21e455468e70106397448db083fbf3bb6a98db5c34b630671c8
font_01_sfnt_off0000f611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 10652 bytes
SHA-256: 23d759dc55773829145816e898439801ada53c75b8d0aaa7b2c07046db2e595a

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