Malicious PDF — malware analysis report

Static analysis result for SHA-256 e790a2d7e2429fe7…

MALICIOUS

PDF

82.1 KB Created: 2021-04-10 10:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f2331a48859f3985b4aedf10142e625a SHA-1: e11a7cb86b003bcaea0b77f0304a250d3ae5a7dc SHA-256: e790a2d7e2429fe7adfe592a5479286db0fb9dedae7f2e317c6b2ebd6643dccd
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting or unknown reputations, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, aiming to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=the+danger+of+a+single+story+ted+talk+summary PDF link annotation
    • https://cdn.sqhk.co/xejadukoxeta/ibd80hf/simoros.pdfIn PDF document text
    • http://gbo.guru/how_to_rebuild_a_bostitch_floor_nailerzu3ix.pdfIn PDF document text
    • http://remont-pc.website/25392003384u8bg7.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/3njcibT/samsung_print_service_plugin_android.pdfIn PDF document text
    • http://logorag.22web.org/video_player_for_android_2._3._6.pdfIn PDF document text
    • http://dkblogin-de.com/a_stolen_life_jaycee_dugard_free_dow8nwwo.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/igwjbRM/rogewamokunevawetel.pdfIn PDF document text
    • https://cdn.sqhk.co/zabadiripo/nibiepM/wazavo.pdfIn PDF document text
    • http://bigswinner.space/google_chrome_flags_settings_androidiflmw.pdfIn PDF document text
    • http://electorat.org/24904186948twxvy.pdfIn PDF document text
    • https://cdn.sqhk.co/pubusudes/ihghdjh/61292513992.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/jNieWRJ/prop_hunt_portable_mod_apk_1._3._3.pdfIn PDF document text
    • http://cheapkeys.site/30061513387yoqj5.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/hjjfIVY/crack_shooter_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/dGThdOL/josawewafalimefeges.pdfIn PDF document text
    • http://afracheat4.xyz/11461705867o76yc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tatovod.epizy.com/foxawewoxotekovifevi.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/gifekumexemu.pdfIn PDF document text
    • http://nidawijonag.rf.gd/dofugatukirifo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/33643131177.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/wakusukixukifikijole.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/60993623038.pdfIn PDF document text
    • http://janibiledepe.rf.gd/test_for_carbohydrates_experiment.pdfIn PDF document text
    • http://gerubetez.rf.gd/fazufosuxebube.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/fingerstyle_guitar_christmas_songs.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF57 5436 bytes
SHA-256: 23b8c3e642ea484b9ef0898fc20f2419dbf156aecc11ce0e927dcc32b5f69b42
font_01_sfnt_off000111b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B8 11504 bytes
SHA-256: a143db4acf53b8bb8e300df5652418184340f5d9044c99edd7d751966d927e62

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