Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d5257616fde884…

MALICIOUS

PDF

77.6 KB Created: 2021-04-06 17:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fbba48f931be4acf4f235f3417653331 SHA-1: 13680028f7a554841b5db4bf505264159392245e SHA-256: 62d5257616fde8846a7f282619da86526dd644f1bafc67edc24c5980fbcbdef0
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-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://jumiwimov.ru/123?utm_term=anticonceptivos+orales+farmacologia+pdf PDF link annotation
    • https://cdn.sqhk.co/fosuzonarefi/gejehhG/14030583196.pdfIn PDF document text
    • http://help-copyrighteamservice.com/xufuruzelusinufawirobukadhmbn4.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/bahubali_2_song_pagal._com.pdfIn PDF document text
    • https://cdn.sqhk.co/biluvetizom/iiGjahi/15796974840.pdfIn PDF document text
    • http://cafechorsu.ru/who_is_lucifers_mom_supposed_to_beqbz75.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/ieggjiQ/tumblebooks_username_and_password_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/anTjbEG/zombicide_board_game_rules.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_00af6f38c22844b4ab3b22c734565434.pdf?index=trueIn PDF document text
    • http://lamekukibudinos.epizy.com/kerala_budget_speech_2020_19.pdfIn PDF document text
    • http://tinurewewe.rf.gd/how_to_tell_if_you_have_cystic_acne.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_37dbde11b5944708b7ff9c53ffa88eb9.pdf?index=trueIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_dff15975e04745b68608f70d15af4c51.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_c892000e37e84e5ab6a1da4a995129e3.pdf?index=trueIn PDF document text
    • http://zinimivozu.rf.gd/tifixawofeluferagomivoba.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_2377f3fee57c4b22bc3a697a914976ae.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_84662377addf4121a51a5cc938472fc4.pdf?index=trueIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_c458611f44a14b0eb298cf6eafdb8648.pdf?index=trueIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_154600c5f4c543198daeca30880c1c21.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_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 5524 bytes
SHA-256: 3c5d5bd294b9777e3ad2385dde0077ed74426692021901003101b8a188d53d0d
font_01_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 10848 bytes
SHA-256: f252f00926bed413f32b936dbe9ce81db3cebc245a6138995abddd44d1515ec2

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