Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f6a6f922c293b5…

MALICIOUS

PDF

87.2 KB Created: 2021-03-09 18:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d118614997e7b276320460683fef4e82 SHA-1: 8f7630fb36dcfeff53b308547485f3b9e7f975bd SHA-256: c2f6a6f922c293b57e6ddf318e2693745d90ef73edd1c7265eb360039157610a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://nipisod.ru/123?utm_term=terraform+aws+availability+zones PDF link annotation
    • http://govnosiakxws.online/total_war_shogun_2_steam_reviewshh053.pdfIn PDF document text
    • http://circus.market/143835706316yhbw.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/jiikghn/download_game_kitten_match_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/CpxjMhb/ledumaziponipapenusoriza.pdfIn PDF document text
    • http://shoppingyxplus.xyz/jipadipopokatonax7zz59.pdfIn PDF document text
    • http://bestsaleshopin.xyz/real_offroad_prado_driving_games_mountain_climbw5khk.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/UnRicih/badibi.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/mikibetiv/ap_world_history_matching_trios_1450_to_1750.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_d7dde1e2d98748f3b067ae590fb637fb.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_30c28bc88d8b4826a048db704a58fec4.pdf?index=trueIn PDF document text
    • http://sukisemejiwu.epizy.com/sony_rx10_mark_4_accessories.pdfIn PDF document text
    • http://danudur.epizy.com/song._pk_application_for_android.pdfIn PDF document text
    • http://fovusuru.epizy.com/19964614197.pdfIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_694a21b16f724df59e722515c505eefa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/blackberry_phones_android.pdfIn PDF document text
    • http://retobawunabe.rf.gd/90098194304.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 5304 bytes
SHA-256: 2b2b46d743c36ea127c53cd89d117c5e695c43991f332816b3570cd84e142935
font_01_sfnt_off0001108c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108C 12212 bytes
SHA-256: b662fbc843ea41ddffeb57b3733e33a6a2f9731e64358488482cd08b8ca80e54
font_02_sfnt_off00013a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A44 16232 bytes
SHA-256: 1bdb952dea1c6aa7c0b742d474ebfef23f69e103f1a138e4eb72ec3dfd677210

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