Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e887f41ad0130be…

MALICIOUS

PDF

80.1 KB Created: 2021-04-03 06:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4c513227b4dbf687ce32ad560ff9bacf SHA-1: 96d559a59af2495f7ab8dc52ed5b818fe8cd39b8 SHA-256: 8e887f41ad0130beb03a1813bb43a125ca508f4e1b1982ae40b16d7d18eaa5bc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to host many links on low-reputation domains, likely to distribute malware or phishing content. The primary URL suggests a lure for software keygens, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=driver+navigator+keygen+download PDF link annotation
    • https://sulefufevonabu.weebly.com/uploads/1/3/4/3/134363738/wamix.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/yUgfggY/rubber_chicken_song_despacito.pdfIn PDF document text
    • https://cdn.sqhk.co/fosasukenum/JIicC4i/werepobilin.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/VVhhKkJ/zero_city_zombie_shelter_survival_hack_money.pdfIn PDF document text
    • http://mon-cmb.best/wakiwazobuwuzm1hbb.pdfIn PDF document text
    • http://cashtanks.fun/animated_video_songs_for_kids_free0v6xq.pdfIn PDF document text
    • http://shop50off.info/asus_p5qc_bios_updateqbq0r.pdfIn PDF document text
    • http://kemytbok.xyz/hp_laserjet_100_color_mfp_m175nw_printer_driver0c4nv.pdfIn PDF document text
    • http://teksol.xyz/2392297765gxfdt.pdfIn PDF document text
    • http://whitetwo.space/what_do_dog_attack_dreams_meanbyaby.pdfIn PDF document text
    • http://webmastervlad.ru/best_place_to_shoot_an_elephants_in_chiang_maiq1nqa.pdfIn PDF document text
    • http://accface.in/bugegidezedizunotakukufwp.pdfIn PDF document text
    • https://polemezal.weebly.com/uploads/1/3/1/4/131452876/walobosujib.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/gguibij/space_invaders_atari_2600_emulator.pdfIn PDF document text
    • http://bred-enligne.com/gestalt_principles_in_logos_answers7lrei.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_867c1679a2454e18b21407b69d4be2d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecea3c98-26ab-4270-a3aa-d9a0e2c5e461/jadilab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/565e3d2a-d521-4ab4-99d0-6d14f69384f6/how_does_alexa_fire_tv_cube_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db953df-cb50-4962-9096-6226c61019ba/imagery_used_in_letter_from_birmingham_jail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074d73e3-b268-4d8c-9bf5-358afcd7990f/24649736667.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_09b2bb16ff694e60b94cd457ca6acb24.pdf?index=trueIn 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_off0000fb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 5132 bytes
SHA-256: ff7c5d6b1d3b195f1aebe0922d05e79fe8ecff3a9172055695f8dbb03a1ec4f1
font_01_sfnt_off00010cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEF 11200 bytes
SHA-256: 99306d946812df80380ca392851c5f470472051c7d1c7fb8a6ad954247e9842e

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