Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67894388d5f4c0a…

MALICIOUS

PDF

62.0 KB Created: 2020-11-20 07:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 71684b7779678c544e48ffb8d83bced9 SHA-1: 11ad8b55bbdfcc5051fd499f4eb7f5cb66193903 SHA-256: d67894388d5f4c0a736488b79ad825841331750e74ee569d0bbdccf05e7b42a3
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 0.9997

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://traffking.ru/aws?utm_term=adrustam+1992+songs PDF link annotation
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/tupesukifijikarugix.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/sugosubexez/coliform_levels_in_food.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/katoxepadefomuxirewex.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/31164791087.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/spoken_english_in_tamil_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/97323494817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f485093e-1a2e-471d-905d-aff9875b7c1a/11538847668.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/ordering_irrational_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/biparental_inheritance_of_mitochondrial_dna_in_humans.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/67173011187.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/the_gerund_phrase_worksheet_answers_chapter_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd7c01d4-d0b1-4beb-a208-0d8dd9652b5d/90759261737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e3b873-b897-4caf-8f74-5fdee0dded5a/gta_5_online_money_glitch_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/xokoruvilegew.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/accounting_financial_statements.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 4

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_off0000b432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB432 5440 bytes
SHA-256: ae4b946ac41b6e382c0240a53fbe2d58e1f549e3a0fc54c1e306bc03dd522ebd
font_01_sfnt_off0000c6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A2 11184 bytes
SHA-256: 81533f4ac78ad95efe4824a9852f5058154e1ec7f28ff61ad8c12fe6ad95cdbd

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