Malicious PDF — malware analysis report

Static analysis result for SHA-256 47eb2677c2a0c649…

MALICIOUS

PDF

66.0 KB Created: 2021-03-02 18:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8d7ff9f590eb88e7b214587e498c254 SHA-1: e461422805d4134ab0feee24bfbdc1a3b4903e2d SHA-256: 47eb2677c2a0c649327c8a0868a07720a0b094b19bc875e44bbfe8eff44b6e97
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=oreck+xl+hand+vacuum+manual
    • https://cdn.sqhk.co/pikuworano/goRhiie/top_conference_calls_apps.pdf
    • http://kavelizopepi.mywebcommunity.org/negunasapuvu.pdf
    • http://lixorajepidil.mygamesonline.org/beloved_image_free_download.pdf
    • http://lalexejiwisejul.iblogger.org/95568874924.pdf
    • https://cdn.sqhk.co/vojofarakiva/jaifbgd/oscar_wilde_nyc_halloween.pdf
    • http://tudewulowas.iblogger.org/edital_auditor_fiscal_df.pdf
    • http://zememor.sportsontheweb.net/new_yorker_student_subscription_tote.pdf
    • https://cdn.sqhk.co/vumuwuxa/HjfzIie/super_pks_krynica_lublin.pdf
    • https://cdn.sqhk.co/vefusujix/jj3hajc/sound_equalizer_bass_download_for_pc.pdf
    • https://cdn.sqhk.co/dejuxafe/igegdic/solitaire_card_games_for_suits_247.pdf
    • https://cdn.sqhk.co/wufotubi/aihKjeM/novesilamewiwafekon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://limekukojaso.epizy.com/capitalismo_de_estado.pdf
    • http://bevevekafoli.epizy.com/menabugag.pdf
    • http://torobedi.epizy.com/fugatavelulivitejivel.pdf
    • http://nazozogev.epizy.com/pujolese.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5ae.bin
74db88fe605055c51e07102b70b4e48404891edcfc576c22a14079d4df7d6d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AE 5220 bytes
font_01_sfnt_off0000d74e.bin
6d2289df23d67c62ad7d0ce699cb1860ac9c21a10a49ee906552f3eebda2a43d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD74E 10692 bytes

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