Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab8c6b036454838…

MALICIOUS

PDF

76.7 KB Created: 2021-03-09 12:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0e131e97788be9998d9e22d8d7c3d341 SHA-1: 96cf8531fcc8df9b60e24685fadfb1c82a78ab10 SHA-256: 8ab8c6b036454838f1b80bdee4e37b6a5592f75eb5137277c31cf6b990d5df5f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high heuristic flagging it as malicious and ClamAV detecting it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'quiz'. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious website for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/award?keyword=free+5+love+languages+quiz+pdf PDF link annotation
    • https://cdn.sqhk.co/vedimofaw/6haighb/warpath_bowling_lanes_kingsport_tn_prices.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/zalilumowifivivxm0xm.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/ZPiehHa/ant_colony_warfare.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/46428539324xu5z3.pdfIn PDF document text
    • https://cdn.sqhk.co/kasesiseb/YYngjii/hill_car_racing_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5febbf8fb786e.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/hdusKGg/zesuv.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/igfjChi/xadelopogumiboremijuxogam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5fe6956578fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470985/normal_602885704a24d.pdfIn PDF document text
    • http://socialwave.me/lewis_medical_surgical_nursing_10th_editioneqny8.pdfIn PDF document text
    • http://alcozerox.com/spot_the_spy_mobile_cyber_security_appsuk5zl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/134db121-a639-4025-ae2e-559ad9395f3a/87549213331.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/romeo_and_juliet_vocabulary_act_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7a28d2-ccde-477f-bf58-35334e12e422/how_old_were_the_child_actors_in_harry_potter.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/vidmate_app_er_2019.pdfIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_df06d3b5960848b69f334a49810f4989.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zexozavo/59658121580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f5f8b6-4686-44fb-bae8-7ddb5c1b0de3/hitchhikers_guide_to_the_galaxy_book_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423bbac3-c7c2-442a-8aa8-25150a404c2f/what_size_is_polaroid_600_film.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/platform_toolset_v140_cannot_be_found.pdfIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_802d53b90f034ce4901dd69284ac568a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/beep_sound_censor.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_55472c54f93240f7953143d8aaa0635d.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_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 5524 bytes
SHA-256: 49f0a8a412c48ec26d48c8c58f0828484ff18e16f4f47649f13b97cebe37d306
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 10668 bytes
SHA-256: 821c8b8742e49656a0925ecae1c8a61c901c3e2fdfa9e7ec5931709fd3146316