Malicious PDF — malware analysis report

Static analysis result for SHA-256 f925303fa86bf373…

MALICIOUS

PDF

79.6 KB Created: 2021-03-20 23:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d95aee2af31821b3c6e41f5d98742b1 SHA-1: edd694fee3437335660f15d9aa98f117ff4929c8 SHA-256: f925303fa86bf373121c83e4574ffd56c7015038c6da8b44f6825a19770af13d
146 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'SE_CALLBACK_LURE' suggests a phishing context, and the presence of numerous external URIs indicates an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/123?utm_term=belgium+national+anthem+sheet+music PDF link annotation
    • http://redanixidofax.iblogger.org/anti_ragging_form_delhi_university_2018.pdfIn PDF document text
    • http://febirag.iblogger.org/19942817219.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/secret_sister_formsburr6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_600cba3f72ce3.pdfIn PDF document text
    • http://robolab.one/how_to_cook_a_hot_dog_bunkhee2.pdfIn PDF document text
    • http://nenugatigubom.66ghz.com/definicion_de_enfermeria_segun_varios_autores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_60349dfa85056.pdfIn PDF document text
    • http://hopecommunitynaz.com/59516880574acf60.pdfIn PDF document text
    • http://kulotufiw.mypressonline.com/livaturoduvobexoxoga.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/88159945925.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5fccaf37817e2.pdfIn PDF document text
    • http://fasad-dom.site/nezanoxonovubitg9e7.pdfIn PDF document text
    • http://difanitukovu.mywebcommunity.org/nom_cirugia_ambulatoria.pdfIn PDF document text
    • http://lunamawel.22web.org/bitesufidufokoloso.pdfIn PDF document text
    • http://creamwalls.online/sailing_made_easy_freeafsbs.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/wovekobosobipakepox.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/39023941461.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://rubabup.epizy.com/lafepoxusatulumitiv.pdfIn PDF document text
    • http://meganisaniwo.rf.gd/66526700841.pdfIn PDF document text
    • http://rojolegov.epizy.com/reflux_still_plans.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/randomized_algorithms_tutorialspoint.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_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5048 bytes
SHA-256: 166bbd90e85eb653c4d64012ab5b9346b2c15947ee9698b1b2adc2b10854d369
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 11572 bytes
SHA-256: 92994793d82b7785573f55ef914f9c248acc30001d238da549813d37f3552ecf
font_02_sfnt_off000122f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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