Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd22c004dfe77c2…

MALICIOUS

PDF

77.6 KB Created: 2021-02-15 11:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 53eb5a1e9bcb641786e47746ec02bcb9 SHA-1: 35ac2655a98606bcbe6b2cd69afa0fc6e00381c1 SHA-256: bbd22c004dfe77c20f52de8d46cf75b624350da8f759684ed857302cd264b39e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains a title related to image editing, which is likely a lure to disguise the malicious intent of directing users to potentially harmful external sites.

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://druttle.ru/strik?utm_term=how+to+make+a+photo+transparent+in+procreate PDF link annotation
    • https://cdn.sqhk.co/luginuwi/jieg5ie/tufozevisirobifozosexun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_6023d71c1f991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5ff28e11a50be.pdfIn PDF document text
    • https://cdn.sqhk.co/soxobiwefili/gfickCT/nosenoviposiretiguka.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/rgiotij/chex_quest_3_wad.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/jjhdphp/best_video_player_download_for_laptop.pdfIn PDF document text
    • http://robinmani.site/costco_bamboo_sheets_roadshowlnin0.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/Uhiihjf/39095786656.pdfIn PDF document text
    • https://cdn.sqhk.co/lasokixon/gjifhhN/wazusekoril.pdfIn PDF document text
    • http://effektzhizni.ru/pusuzutobazuzvzms.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/ijji8ge/25442150119.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/Fih4djj/61818503364.pdfIn PDF document text
    • http://tegor.xyz/bombsquad_mod_apk_1._4._149nyzho.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/igibjjd/nerf_gun_ball_shooter_for_dogs.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/gmwghUb/war_and_magic_kingdom_reborn_1000_k_power.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5ffde282ac697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_601436f925d19.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/hjgjcAT/monster_city_mod_apk_unlimited_gems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sowinoto.epizy.com/best_budget_app_android_2018.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/14886197286.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 5044 bytes
SHA-256: e64d9a69b792591cbee4732283ac86999f4d75ad8613213c6c522b0d8e872641
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 10796 bytes
SHA-256: 58aea983678bfbefe6ba966d5fedb62ba8a3fb99394c3d478600e12f95cb715e
font_02_sfnt_off00011b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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