Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc006ce8bcb0affb…

MALICIOUS

PDF

75.1 KB Created: 2021-03-01 01:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4e3a7a80d6dcebc077f4cbd7b5ab1862 SHA-1: 77554db183ac847b8e74c0f2f481dab91b030ca6 SHA-256: bc006ce8bcb0affbca35061851ad48e34244c5e41b94d2aeda91abf9e82ebde1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing users to `fokemale.ru`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to a 'calculator sale', suggesting a lure to attract victims to the malicious domain.

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://fokemale.ru/strik?utm_term=ti+84+ce+calculator+sale PDF link annotation
    • http://kojazunupetip.mygamesonline.org/sotadofusokalamuxavo.pdfIn PDF document text
    • http://silver35.ru/36918204696ilulu.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/used_car_inspection_checklist_template.pdfIn PDF document text
    • https://kisobodowawon.weebly.com/uploads/1/3/1/3/131384145/a0be28d8ece2.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/betanilukemononewa.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/07aaaeb83945.pdfIn PDF document text
    • http://mivukiwoluwuj.iblogger.org/furutirutarujusepira.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/do_solar_watches_need_battery_change.pdfIn PDF document text
    • http://doordash.link/mayer_air_fryer_user_manualvwyey.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/zotifigunof_diromepumimome_ralejunebu_zodivewuf.pdfIn PDF document text
    • https://mudagetani.weebly.com/uploads/1/3/4/3/134381332/maxamanem.pdfIn PDF document text
    • http://smotrikino.fun/kekedonejevuzabsq8m5.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/zetituri/39159430573.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/jowabefufewawagorizigaxel.pdfIn PDF document text
    • http://koraxirimaxodet.epizy.com/84989736544.pdfIn PDF document text
    • http://bojiwivepexa.epizy.com/how_do_i_put_galaxy_buds_in_pairing_mode.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/sony_bdp-s1500_wont_connect_to_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/34449359654.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_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 5024 bytes
SHA-256: 8287be8d8c7328c33f04b9f4d4d9ffa637624a6991529da8f247e2331e3b97f1
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 10708 bytes
SHA-256: 5d306d7940d7216a259f6f43479fb50698ffd33c413519f6e785799e651ba267

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