Malicious PDF — malware analysis report

Static analysis result for SHA-256 940b9b3e287865a2…

MALICIOUS

PDF

78.6 KB Created: 2021-04-19 02:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a4dbb32830b1f9d34309a9742c1864a4 SHA-1: 2899565ddc7c0a14af12a9131a597cc2367dcd3e SHA-256: 940b9b3e287865a29922aa11e493e12d617d93a12821a9f506b80ba4f2a9c61b
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL pointing to a suspicious domain ('seumenha.ru') that is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a movie trailer, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/strik?utm_term=the+song+of+scorpions+movie+trailer PDF link annotation
    • http://pekibule.iblogger.org/xivurebigetopexifimekotuw.pdfIn PDF document text
    • http://kesenirevapovid.iblogger.org/57956164522.pdfIn PDF document text
    • https://womijepadake.weebly.com/uploads/1/3/4/4/134476187/mawibusogedadofe.pdfIn PDF document text
    • http://icub.tech/49274907808nu29u.pdfIn PDF document text
    • http://zunuwapinab.iblogger.org/kickboxing_workout_routine.pdfIn PDF document text
    • http://natikolom.site/6083701849q0332.pdfIn PDF document text
    • https://pexefosakojoma.weebly.com/uploads/1/3/1/4/131406105/98ae4.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/dakabemeraje.pdfIn PDF document text
    • http://canonsburglake.com/3872172090501ext.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sidiwen.epizy.com/lavarropas_ariston_avtl_60_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e0ce79-1edd-4278-bfcc-741dd6ed5d71/odd_thomas_books_in_order_of_release.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/gritstone_trail_walkers_guide.pdfIn PDF document text
    • http://pulejebolev.rf.gd/galesetopirit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d7b9bf-a66d-4302-aa84-045b08b0667a/types_of_beaks_and_claws_in_birds.pdfIn PDF document text
    • http://rugapekazudi.epizy.com/wewijugowemagenabiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d486ef0b-679a-4277-ad8e-59cbcf33a920/nixuzopewanamenerimevew.pdfIn PDF document text
    • http://pimibini.epizy.com/vigifejamusaruzigabubi.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/alphabet_in_arabic.pdfIn PDF document text
    • http://xidapevow.epizy.com/work_in_the_21st_century_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/xerakizikozotabalokuw.pdfIn PDF document text
    • http://nogamijabuwemi.rf.gd/bloody_roar_3_android.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/kuiu_guide_pants_vs_attack.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 5436 bytes
SHA-256: 35b1aee18ae4a948faedac22b50dc9a806b4da15714e16a0923c992af12db10f
font_01_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 11276 bytes
SHA-256: 6bb504acc7a381abd161c752cfe1dee9468889ef4f9f96269275de92e06c1619

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