Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43f269293c0fdb5…

MALICIOUS

PDF

76.7 KB Created: 2021-01-25 19:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2cd5d334049770973d690b1324c778f4 SHA-1: f94b3a9870d3fc6c064f347586a035e482e7b6e8 SHA-256: b43f269293c0fdb5c45f690021c452134d6974353dae95d0d0251d8f7e48711e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a common tactic for distributing malware or conducting phishing. The document body, though heavily obfuscated, references 'zoo tycoon cheats dragon', suggesting a lure to attract users searching for game-related content. The presence of multiple external URIs and a link farm heuristic further supports the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/123?utm_term=zoo+tycoon+cheats+dragon PDF link annotation
    • http://cactusvpn.live/944287518896haj1.pdfIn PDF document text
    • http://instapriz.website/retro_dangerous_dave_mod_apk56pye.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/iQyjijj/aquapark_io_apk_indir_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/fkI3hhf/wijumiz.pdfIn PDF document text
    • http://intereriia.com/744229753665iuxh.pdfIn PDF document text
    • http://english-10.site/15431926184zfekq.pdfIn PDF document text
    • http://vir-tus.com/detroit_red_wings_charter_planeu2mxf.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/Wrfjhgg/kibivur.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/es1hbTH/vax_carpet_cleaner_black_friday.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/dikokijifezabpys15.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/ghhjiaN/73426242766.pdfIn PDF document text
    • http://lasns.fun/69500762291f5vbc.pdfIn PDF document text
    • https://cdn.sqhk.co/mujejadalale/VDZigLq/29373374403.pdfIn PDF document text
    • http://matteset-spon.space/cervical_spinal_stenosis_icd_10frd7a.pdfIn PDF document text
    • http://qwertyujg.xyz/2642960309636fx.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/giaSGr6/the_holy_quran_in_english_audio_download.pdfIn PDF document text
    • http://storeeu.info/block_story_free_downloadj76vp.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/notion_notes_tasks_wikis3r73y.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/ihhcfqD/1275851457.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/najipavez/rurosuzavoboresaxepik.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/competition_act_2002_mcq_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/cricket_score_sheet_signs.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/ansys_mechanical_scripting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/juvuwuwajegudut.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_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 5228 bytes
SHA-256: 10f2bc0eeb6d8a77cdb0c2c82c911c7506197538556a37ac10b56597deb9f905
font_01_sfnt_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 10684 bytes
SHA-256: d6ad6d1141fd5a83a28811236d1eaec6628007c895538836056bfdefda67b391

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