Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5a3ceb65b93854…

MALICIOUS

PDF

94.2 KB Created: 2021-03-26 13:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1b5a595e301a1b78eaf5ecfed6c4ae10 SHA-1: 54c4a50f06158f14dc451077ea106a9143c138f2 SHA-256: 1b5a3ceb65b938545ec6e7d95282e02837b8c7423cfaca4382cac37289c90068
146 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and a phishing lure, with a high ML classifier score and ClamAV detection. The embedded URL 'https://zajinet.ru/wix?keyword=roblox+hack+no+download+or+survey' suggests a lure for game-related cheats, likely leading to malicious content. The document body, though heavily obfuscated, contains references to 'Roblox hack' and the authoring application, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://zajinet.ru/wix?keyword=roblox+hack+no+download+or+survey PDF link annotation
    • http://13millions.store/ms_word_formatting_symbols_listwms4h.pdfIn PDF document text
    • http://jushq.pro/84052790637jmayt.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://teksalle.xyz/nafogubudatadulesozorzpedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388406/normal_5fcc00ec62e7d.pdfIn PDF document text
    • http://unlockdeals.shop/become_what_you_are_alan_watts_bookx2b4i.pdfIn PDF document text
    • http://paringljkf.com/papyrus_font_google_docsnknva.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/74863228619pkzp9.pdfIn PDF document text
    • http://khanapoorti.com/acido_laurico_propiedadeslw5xr.pdfIn PDF document text
    • http://aydym.club/diana_dill_plastic_surgery88by2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426085/normal_5ff634d2a07d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae044cd7-ad7c-4b51-836a-ea99192f7989/danezifopavebijumadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b26198a-8276-4aaa-b341-fe484e5177bf/10352303567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06893bd-8bd8-4136-bc2d-e2b88c735b14/rinnai_propane_heater_thermostat_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1928fc82-4e9e-434b-8660-80194db1bfbf/blue_iris_flowers_washington_dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c051a3-853b-4791-909e-350c29cd2111/28421253485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6324ffd-199f-46bc-99a9-9890982cf1fe/is_butter_low_fodmap_monash.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/6353832238.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/music_theory_lesson_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0572a71c-e411-44c2-b4f9-baf51bd9cabf/dogazibigerivivibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3bb29d-3306-467f-b9c6-73511d915853/what_to_do_when_a_previous_employer_owes_you_money.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/zemazinoxugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abeb544e-4617-4700-9231-9a9f2f886836/is_fl_studio_a_monthly_payment.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_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 12352 bytes
SHA-256: f91840fbe0158f03034b2327047a56ed8dfd15aaa0e662ca26cec35c56764535
font_01_sfnt_off00013003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13003 5560 bytes
SHA-256: 8adb33c5b6f1ffb8cdf188ee6a3f9e8c2ea09c4648a9aac205483d14d29ae027
font_02_sfnt_off00014305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14305 11740 bytes
SHA-256: c9f5e8e4debe19c957321d2d14d08e3838bc5ef805d8ccc5103d93a282724a06

Open this report in the interactive analyzer, or submit your own file for analysis.