Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a193095097b5171…

MALICIOUS

PDF

77.1 KB Created: 2021-03-01 15:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ea7cea1b4300687e623b32c25bcb2ca SHA-1: eaf3c46f439c7cc3d881755a13c790d8bcdbaf47 SHA-256: 3a193095097b517110c999bc1925fc9a1c143abe5982f375607999720d71bddb
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure aspect.

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://lozipotod.ru/wix?keyword=ipc+questions+and+answers+in+hindi PDF link annotation
    • http://xufelaketodo.getenjoyment.net/2002_mini_cooper_service_manual.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/vebusikok.pdfIn PDF document text
    • https://weranatowo.weebly.com/uploads/1/3/1/4/131408071/3316050.pdfIn PDF document text
    • http://zodusen.22web.org/arcserve_udp_6._5_update_4_agent.pdfIn PDF document text
    • http://fokojudup.22web.org/noxapidaxuferidifoxamol.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/how_much_does_a_general_dental_check_up_cost.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/dumazitigi.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/dungeons_and_dragons_core_books.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/corsair_gaming_k95_rgb_platinum_cherry_mx_brown_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/casio_ct_x700_price_in_pakistan.pdfIn PDF document text
    • http://xovimed.rf.gd/tuwelelejola.pdfIn PDF document text
    • http://fovelevewud.rf.gd/elder_scrolls_online_race_and_class_guide.pdfIn PDF document text
    • http://muxibiw.epizy.com/bleacher_report_raw_results.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/jobs_matching_worksheet.pdfIn PDF document text
    • http://mesodixole.rf.gd/76822203896.pdfIn PDF document text
    • http://lepejifilafimif.rf.gd/kinapunubirixim.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/lobokimu.pdfIn PDF document text
    • http://wojuzixe.epizy.com/guide_des_habitudes_de_travail.pdfIn PDF document text
    • http://tamupevex.rf.gd/zogexitixurepitejepi.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_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 5284 bytes
SHA-256: f2e740cf95dc5104491e29a7e921884e8ccdd5ae00eaacc366c4f5a706e94292
font_01_sfnt_off00010349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10349 10336 bytes
SHA-256: 49ac03b5d3d51e9f97b9004bbf523b1adeb52944164cd8ed983444bf97a56eaa

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