Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc15c7d39bb1cc2d…

MALICIOUS

PDF

75.7 KB Created: 2021-02-28 19:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6ce9c8a10d9cc36c938077c0baa5e2eb SHA-1: 2576afa2d28dbc7f38e94792d0d4ba46b80d4a7c SHA-256: bc15c7d39bb1cc2d8ebf2fc1535465479d8c6ebe4e925409808961fc5a466bb0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential phishing lure. It impersonates Apple, using urgency language to prompt users to click a link, which is hosted on disposable domains and likely leads to credential harvesting. The document's structure and embedded URLs suggest it is designed to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/datoma.pdf.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/strik?utm_term=does+iphone+5c+have+same+sim+card+as+6s PDF link annotation
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/datoma.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/icJa6ii/hello_neighbor_toys_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/phjOrcD/earn_to_die_2012_hacked_part_2.pdfIn PDF document text
    • https://tusozokusex.weebly.com/uploads/1/3/4/6/134678333/9609689.pdfIn PDF document text
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/tigoxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_5fd9c27d3bce2.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/fo9tYhf/motorcycles_for_sale_by_owner_memphis_tn.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/pamovegeropetabodabe.pdfIn PDF document text
    • https://pakitaxe.weebly.com/uploads/1/3/4/3/134318313/fomajewi.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/AGPZiib/first_aid_training_in_gujarati.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/mefadedosuw/cuneiform_bone_fracture_x_ray.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/men_s_fashion_gift_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/jazuxumavovivorigemojo.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/45064742536.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/bike_ride_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/59011669804.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_off0000e7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 5616 bytes
SHA-256: d82e00bce821e0587e5c0a9ba454b48d69729700ae2bc104f77ad4585812e427
font_01_sfnt_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 11244 bytes
SHA-256: f9eacd79feba2a094a0665baa3501a4193e0ec107138b6f2cefa8fd5cb42cc48

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