Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d79fac780f6cc8…

MALICIOUS

PDF

74.2 KB Created: 2021-05-11 06:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b2846b7744cede11128fd92afb6f5eb1 SHA-1: 429208f326e872a17c24601e39f3467323f2101a SHA-256: e0d79fac780f6cc8290139b3eb8879cad233fb22bc2bbc5145ed71c30a94e6ad
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'voltage drop series and parallel circuits', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=how+to+find+voltage+drop+series+and+parallel+circuits PDF link annotation
    • http://antonio-ita.space/datenizsc2w8.pdfIn PDF document text
    • http://dubiniba.iblogger.org/feiertage_aargau_2020.pdfIn PDF document text
    • http://xatamekele.iblogger.org/formelle_anrede_englisch_mail.pdfIn PDF document text
    • http://my-favshope.online/how_to_change_samsung_galaxy_tab_2_charger_portg1sja.pdfIn PDF document text
    • http://lujoxowuri.iblogger.org/85165457118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5fede1b73a25a.pdfIn PDF document text
    • http://titanovyi-filtr.ru/attestazione_di_conformit_avvocato_modellouz6nu.pdfIn PDF document text
    • http://tacfitproducts.com/biblias_de_estudio_gratis_en2mbh4.pdfIn PDF document text
    • http://sunmarkt.ru/briggs_and_stratton_leaking_gas_out_of_carburetor3mxvv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5ffc31854bb21.pdfIn PDF document text
    • http://krokoboko6.xyz/sesadojuwuwusixewevrz3kw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_2dd5e7d43e604535b6f496715f10353e.pdf?index=trueIn PDF document text
    • http://lalugutur.rf.gd/search_engine_optimization_basics.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_5a970c5f534745fca25b5616cb294cf0.pdf?index=trueIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_7b21b271b3c74a418c172d6f95ed883d.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_248b2710e03440059105751098fe2b00.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_6b161941a7a34fecb04ba962be545686.pdf?index=trueIn 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_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 5436 bytes
SHA-256: 885cbf7e72a93383a4e364f6c5c2c53ed438f902fd2eb013397e10c2efee0445
font_01_sfnt_off0000f5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D9 11100 bytes
SHA-256: 51be23ecde4c02022c3cd8fe97b3a653a79b461e2ae092250702f08445b3600e

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