Malicious PDF — malware analysis report

Static analysis result for SHA-256 deebe4bb115a5d84…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 19:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 60c794643b89cc4e0b51073e163d44bd SHA-1: 57b327b1a7954b43fcb3306b145ad307bc8ab2ed SHA-256: deebe4bb115a5d84c9b3c36ad657c59d67612943de0b1ed1756acf18c319c498
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/123?utm_term=free+sheet+piano+music+for+popular+songs PDF link annotation
    • http://ijmalan.xyz/tejuwavikusaj0e85.pdfIn PDF document text
    • https://puwaxitakobesod.weebly.com/uploads/1/3/4/1/134109073/powuraxefonibekib.pdfIn PDF document text
    • http://copyright-central-media.com/44939124705hx76w.pdfIn PDF document text
    • http://romeital.space/2020_panini_prizm_baseball_trading_cards_blaster_boxu6bra.pdfIn PDF document text
    • https://cdn.sqhk.co/bureruverog/jdig0gj/15_days_belly_fat_workout_app.pdfIn PDF document text
    • http://winwites.space/84540695884imqca.pdfIn PDF document text
    • https://dawejufajipamoz.weebly.com/uploads/1/3/5/3/135350304/figugevojipaxit.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/drhg9V6/19601585142.pdfIn PDF document text
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/takepiwidubepezafuf.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/jcifCjh/dinosaur_simulator_dino_world_game_download.pdfIn PDF document text
    • http://womenita.fun/21_day_sugar_detox_for_beginnersxn69f.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/9574514.pdfIn PDF document text
    • https://madaleva.weebly.com/uploads/1/3/4/7/134772198/bf0dc35dd42b.pdfIn PDF document text
    • http://wssummer.space/rugosatipubbd2k.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/newuneren-kekuguzuwag-rulusi-lebajuj.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/1463f434d53ba3b.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/ieAPheZ/47687438296.pdfIn PDF document text
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/9789907.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/xURhjhh/nike_run_club_treadmill_distance.pdfIn PDF document text
    • http://creditscorecard.info/lifecycle_gx_stationary_bike1n1vb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3B 5384 bytes
SHA-256: 5e4b74e612c9fbb57b24c09eb9aa5b76e8e8442375a6c5c3ce8697c214a5c670
font_01_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 10240 bytes
SHA-256: 887872af910eb0e73cdff6468ae5543a990a47edaca427108ed613b617265e0c

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