Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d725e7e5712d93…

MALICIOUS

PDF

73.5 KB Created: 2021-04-06 09:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e0af5fde7a5a948c75b4c5944e0a4aa6 SHA-1: 98e62407539d9b8f4eae292309318747184183c6 SHA-256: d4d725e7e5712d93f34a20473e5cd0234c2570476ea21b2fe14af3598ac50c30
186 Risk Score

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-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://gimoguvi.ru/123?utm_term=constipation+naspghan+guidelines PDF link annotation
    • http://normab-id.com/27285873196anghx.pdfIn PDF document text
    • http://nedipupuru.22web.org/igcse_chemistry_notes_znotes.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/83853472968pgx18.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/how_to_bookmark_a_in_adobe_reader_dc.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/10329822212.pdfIn PDF document text
    • http://sevastopol.sale/what_does_the_bible_say_about_withholding_informationuk0uo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bokizimumizom.epizy.com/formal_complaint_letter_template_word.pdfIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_0a241bd850824fa5818e48dceea008d1.pdf?index=trueIn PDF document text
    • http://sagowef.rf.gd/bidinogetowi.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_253095ada1a744388aa0b08959f624ee.pdf?index=trueIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_50a80dbbb913402db15ace155e638ab2.pdf?index=trueIn PDF document text
    • http://wororezijetixa.atwebpages.com/armour_of_god_prayer.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_e2f7108e98a1498c8329bd43c76bf9c1.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_9b8bfa9e48be44778f65a37230aeb81a.pdf?index=trueIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_0041237aa6b6453b99cedc322cbad826.pdf?index=trueIn PDF document text
    • http://varaxijolos.rf.gd/adairs_king_single_sheets.pdfIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_680181b8d7ee449caeaefd12c28635e6.pdf?index=trueIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_d4d539e9be74403185f505f94eeedbae.pdf?index=trueIn 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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5032 bytes
SHA-256: eaff085188d5309c5b4b74ccdefac211b5ff5e54d2edc20cc7efbc1165a2d4cf
font_01_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 10336 bytes
SHA-256: 0c23f0a304a3d0af7e206bd4b0463f54b3f747e8396bfdaeeca77c58a89f2c20

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