Malicious PDF — malware analysis report

Static analysis result for SHA-256 be48db102674853d…

MALICIOUS

PDF

90.5 KB Created: 2021-03-21 21:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e13ebfa29eb939270ebb35c0b5545acc SHA-1: 06eda7c27b3f4db072307f13c5f01060facb9ac1 SHA-256: be48db102674853d97257178899c3403360a04b4afc29779a825197513547b56
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 as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful websites.

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://ponafet.ru/123?utm_term=million+scarlet+roses+alla+pugacheva PDF link annotation
    • https://cdn.sqhk.co/mivesavif/gcfiiXP/pandemic_ebt_virginia_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rotefuver/jjjgYha/79017293183.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_6007f6f66421c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411231/normal_5fd6524d2ed10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_604e86bb2ed71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_6002a19b376e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406229/normal_6009a9f2d4362.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/l7BidV4/smart_car_solo_performance_exhaust.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/Tja543R/tentacle_wars_2_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_601cccd32a924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_604a2f9ce4b4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/segasuvo.pdfIn PDF document text
    • http://veruzixiki.rf.gd/producers_livestock_auction_market_report.pdfIn PDF document text
    • http://tonezifimoraga.epizy.com/98027592207.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/pagofupix.pdfIn PDF document text
    • http://powajokex.rf.gd/symmetrical_patterns_ks1_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/66032627412.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/jivesutapovatonirup.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/examples_of_supply_chain_management_strategies.pdfIn PDF document text
    • http://ninijoziwedef.rf.gd/carolyn_keene_nancy_drew_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/k_s_r_t_c_full_form.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_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 6512 bytes
SHA-256: c86091c51b67ce4c05828ae1c5724f3f89d010fe40457d41e99e3195a57b08e3
font_01_sfnt_off00010aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA3 5260 bytes
SHA-256: 3f2ea1c2144b9578bb304df68c86f59cc41d0254b4cf8a7baa661054cdb4c608
font_02_sfnt_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 26856 bytes
SHA-256: 1c27008146e6150a28d0e4e39ebf9c0b57bde5fdf8615f809bf454dc8a73d022

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