Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d8b4f13e667955…

MALICIOUS

PDF

80.9 KB Created: 2021-03-06 01:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 078256acd637eb275f3b2fed8d1179eb SHA-1: d705e504abcab9930eefac7394bfa82f8056445d SHA-256: f0d8b4f13e667955e15d9f887e61ef50a96903ee403c3eba7245864c3ed2ea1e
146 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to external URLs. While no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect users to malicious content or initiate a phishing interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/123?utm_term=doss+ds-1168+bluetooth+speaker+manual PDF link annotation
    • http://leninuludobodu.mygamesonline.org/61036503369.pdfIn PDF document text
    • https://kubikogemovi.weebly.com/uploads/1/3/4/0/134095998/485878ad5.pdfIn PDF document text
    • https://tujarabevazedi.weebly.com/uploads/1/3/4/2/134235746/womigonivez.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/kukegetojefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_601b21f4abf0b.pdfIn PDF document text
    • http://raifaisentgo.online/pokemon_go_deoxys_speed_raid_guide56ppb.pdfIn PDF document text
    • http://merishwheelrecords.com/108786883297sk4d.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/danizejatege.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/how_to_become_freelance_proofreaderq96yr.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/4952587.pdfIn PDF document text
    • http://1xbets-regs.site/74980335021oj39d.pdfIn PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/xumovuga-wobusejezu.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/neverending_story_limahl_song_download.pdfIn PDF document text
    • http://cancandance.org/engineering_mechanics_nptelzvnfr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_6002a7d510fbd.pdfIn PDF document text
    • http://toppiksnack.xyz/repaso_matematicas_3_primariagj6pt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_603ac23bdf151.pdfIn PDF document text
    • http://felagem.getenjoyment.net/the_crucible_john_proctor_tragic_hero_quotes.pdfIn PDF document text
    • http://stroiline74.ru/863543108980lf7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407571/normal_5feaee6d8c92e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sogivuwe.onlinewebshop.net/how_to_do_exponents_on_ba_ii_plus_professional.pdfIn PDF document text
    • http://widifusi.myartsonline.com/lenovo_thinkpad_t420s_bluetooth_driver_windows_10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 5668 bytes
SHA-256: e1fd1b3c43edf9c2be8d99565f5acaf7f106fa33cbbe2573e097ab1e1434e14c
font_01_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 11028 bytes
SHA-256: e7e813eed8727fe1e1d570eee6bcadaabd2d9af012f8bee0b0c5043ad8da0719
font_02_sfnt_off00012781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12781 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176