Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1127c51be20883…

MALICIOUS

PDF

75.1 KB Created: 2021-03-11 18:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2672144e98f7b900e2b60df0f527a4 SHA-1: 1cb8a39d381249adc54515bb5b5402a44f636c38 SHA-256: 1c1127c51be208835429f55741ba24c3cb0610d695501b8f8c5893a3abcf30df
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 hosting or unknown reputation sites, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nipisod.ru/award?keyword=cancionero+cristiano+para+ni%25C3%25B1os+pdf
    • https://cdn.sqhk.co/mujekesire/Rgjhejh/97325949060.pdf
    • https://xabisipejerifo.weebly.com/uploads/1/3/4/6/134634854/lizagexeperole.pdf
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/069dd.pdf
    • https://giduzuzetedeze.weebly.com/uploads/1/3/4/8/134853145/fufixot.pdf
    • https://cdn.sqhk.co/gederanew/ZDFggib/emergency_room_doctor_salary_chicago.pdf
    • https://cdn.sqhk.co/tatidukigag/Ddghihe/xenusupugo.pdf
    • http://kojazunupetip.mygamesonline.org/43043840011.pdf
    • http://gedirobidepud.scienceontheweb.net/84234262218.pdf
    • https://cdn.sqhk.co/sowuwinadapu/jjjgejc/48119850174.pdf
    • https://molavose.weebly.com/uploads/1/3/5/3/135350427/db93cc94b.pdf
    • https://tewawizibix.weebly.com/uploads/1/3/5/3/135347661/0ec526c74e.pdf
    • https://gobewuguwug.weebly.com/uploads/1/3/6/0/136056794/keboserifinagis-numuz-pajawapoj-fivinutuxoso.pdf
    • https://cdn.sqhk.co/lazujanaziri/gguggjf/game_room_guys_locations.pdf
    • https://zozizifubigidoz.weebly.com/uploads/1/3/1/4/131409074/newiwopavojugirome.pdf
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/1049f702f42.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dereduvate.epizy.com/udemy_ansys_tutorial.pdf
    • http://rabatelekovufar.myartsonline.com/fender_mustang_lt25_guitar_amp.pdf
    • https://uploads.strikinglycdn.com/files/fb3ac820-e13d-49e8-9bf0-559d256a2ac4/vodabubakiruxote.pdf
    • http://sulijugofogim.onlinewebshop.net/40323645339.pdf
    • https://uploads.strikinglycdn.com/files/b2284030-612f-49b7-8244-391404de6675/detak.pdf
    • https://uploads.strikinglycdn.com/files/09a25964-4385-433b-a2cf-5e99ef01392c/coleman_roadtrip_grill_accessory_stove_grate.pdf
    • http://vuloroluget.rf.gd/41220902164.pdf
    • http://pagosunizuboroz.epizy.com/lsat_preptest_86_answers.pdf
    • https://uploads.strikinglycdn.com/files/b9cf9b9c-242b-4262-a67b-4cb5f50fcd0d/best_stock_exchange_in_the_world_today.pdf
    • http://figijosi.epizy.com/does_ipod_touch_6th_generation_have_wireless_charging.pdf
    • http://pojuzuduxotazup.epizy.com/ahista_ahista_song_himesh.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a3.bin
d94f3ad714b03ef69d0629f5373ccc6256f842ff9f27f3d6a0601312706bd7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 5232 bytes
font_01_sfnt_off0000f537.bin
36c51986ea059950dcc35dc21e60402b45eace92d6ea1b5cd033d4152135a84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 12328 bytes

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