Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f11ee38fa3b2fd0…

MALICIOUS

PDF

68.4 KB Created: 2021-03-07 16:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0c6c4fdbf25188cfc62a6199aaffe9c SHA-1: b27b3d4a444ee51461c85404c8427e520d7e2243 SHA-256: 8f11ee38fa3b2fd0342a9c0d60f1f13ec2eb6d261d1381e80f4110d0de172cc6
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure aspect. The presence of external URIs and the nature of the heuristics strongly suggest this PDF is used to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=fundamentals+of+thermodynamics+9th+edition+pdf PDF link annotation
    • http://neip-forum.fun/36781483670oirxj.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/vefutixor.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/how_the_grinch_stole_christmas_2018_on_netflix.pdfIn PDF document text
    • http://jewlgems.com/futujitisusksq4.pdfIn PDF document text
    • http://stylecurtains.com/deja_vu_mp3_initial_dj9xc1.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/824762270397xdx3.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/robadu.pdfIn PDF document text
    • http://kujazudoxiro.22web.org/tovatiwelazijegeba.pdfIn PDF document text
    • http://winoorama.site/80981988304mqktl.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/p_type_and_n_type_semiconductor.pdfIn PDF document text
    • http://elerctum.org/napoleon_hill_mastermind_principlexjpkn.pdfIn PDF document text
    • http://sedouche.xyz/796881836661hpxn.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/biggest_steal_on_golden_balls.pdfIn PDF document text
    • http://fasadi.site/how_to_improve_behavioral_skillsyxv7h.pdfIn PDF document text
    • http://cosmosqrab.online/xinadexovirefoseruvazebejfqvlb.pdfIn PDF document text
    • http://carluxepaint.site/35508393742zkyum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/waloxarukareb.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/convert_tex_to_command_line.pdfIn PDF document text
    • http://pidawuz.epizy.com/12771424350.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/arris_tm822_ds_blinking_orange.pdfIn PDF document text
    • http://xafibejijopo.atwebpages.com/sakamoraguliwunumimogi.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/border_movie_song_wapking.pdfIn PDF document text
    • http://laxukumelukadut.myartsonline.com/livevutomizejat.pdfIn PDF document text
    • http://ziresam.rf.gd/wigominodegeruraxelikafeb.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_off0000cec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC0 5608 bytes
SHA-256: be5c64ce21630473e9e13a4aaa0d2f58df9837c21eb629cbb666bf41343d1414
font_01_sfnt_off0000e1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B7 9928 bytes
SHA-256: f2a8c7637a185340831aa0c45570c336f7a5d67b218a2258be58b522eb4b3354

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