Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed922cc752b607c…

MALICIOUS

PDF

69.6 KB Created: 2021-03-08 15:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d388f495de94b5cb769ffe2ecfb2fac8 SHA-1: 2f0f9d82600b9f9d86f0d3ec9076b1df7401078e SHA-256: aed922cc752b607cbdff8c2485779e4043cc19b66bfa3a2ec03cd2229cc6e177
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to attract traffic. The presence of a URL with 'accurip+_full_+software+cracked+.+iso' in the query parameters indicates a lure for cracked software. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its deceptive content and link farm structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/123?utm_term=accurip+_full_+software+cracked+.+iso
    • http://viwafuxofiseko.getenjoyment.net/soccer_ball_template.pdf
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5ffe7dcf670c7.pdf
    • https://cdn-cms.f-static.net/uploads/4387565/normal_60217ade24ed5.pdf
    • https://cdn-cms.f-static.net/uploads/4409248/normal_60407457bf89a.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/nuwufokorikixolip.pdf
    • http://tuzirawejaw.mypressonline.com/how_to_buzz_cut_fade_at_home.pdf
    • https://betuvumog.weebly.com/uploads/1/3/1/1/131163564/gexem.pdf
    • http://xegazinijitup.mywebcommunity.org/63741574720.pdf
    • https://bikonate.weebly.com/uploads/1/3/4/7/134715396/1874708.pdf
    • https://cdn-cms.f-static.net/uploads/4420939/normal_602d2d97928a6.pdf
    • http://pefiworawodud.mypressonline.com/takimuri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_bb89390025b6456798f0e78f2269f8a2.pdf?index=true
    • http://jozobudesurarab.onlinewebshop.net/hopper_with_sling_not_starting_up.pdf
    • https://uploads.strikinglycdn.com/files/31a6b1d2-2b83-4453-9d1f-4a0218055560/what_is_the_order_of_belts_in_bjj.pdf
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_cef6d41320ea464793848add0728c4e7.pdf?index=true
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_7068212f58b4465f8d5f9aca245c657e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9cced751-f9c6-45d5-836f-ba94a0a838dd/how_to_get_the_best_quality_music_from_itunes.pdf
    • https://uploads.strikinglycdn.com/files/6b7d6674-751c-4537-a301-2276f04aadbb/zivabepenu.pdf
    • https://uploads.strikinglycdn.com/files/bb8c1afe-5515-4e0d-aa3b-2733ce6dfa8f/6484012109.pdf
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_dcfeb80b5dfa461c99f8d5870aa396a5.pdf?index=true
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_5cbfba3a382c488981c86bc189f2a3d6.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_8cca00d6876945008aab93d9d2d0fbeb.pdf?index=true
    • 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_off0000d31d.bin
d7552944a677c7aee349b9836472068e6e5e3ffcfce67622ca7244637615750d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 5356 bytes
font_01_sfnt_off0000e588.bin
3761b0a9a9e562ede480a84630fe4d098dc922dc0e8c2ac54daed17b341a6fad
pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 10352 bytes