Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c01e0c09c2c168…

MALICIOUS

PDF

77.2 KB Created: 2021-03-02 04:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f0c79b10e13672ed8bb4141f03cb3819 SHA-1: 459fc733b7b96b9f9c112013bf45a70989f1c481 SHA-256: e6c01e0c09c2c16899807a23b500fc47e4626614a747c222da463ebe5b4206aa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though partially corrupted, contains text related to a search query, and numerous external URIs were extracted, suggesting a phishing or link-farming attempt. The presence of embedded URLs and the overall structure point towards the distribution of malicious content.

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://nipisod.ru/wb?keyword=where%20is%20located%20sydney%20opera%20house PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5feb02be473e8.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/29551556760.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/2legjsT/miracle_noodles_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_6039aa2b53c4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc80a01d76a9.pdfIn PDF document text
    • http://turiwovezaz.iblogger.org/clinical_pharmacology_of_anticancer_drugs.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/free_thanksgiving_math_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_6036d10c3a47e.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/89562750701.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/OT2hfjg/skyscrapercity_aeropuerto_el_salvador.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/ifD0ihd/2017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412584/normal_5fc70f819ed08.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/ljeAZkF/boxubunomip.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/pulavokaxe/1927470445.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/herbalism_guide_wow_cata.pdfIn PDF document text
    • http://torulebofi.rf.gd/where_to_buy_tv_rabbit_ears.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/82067962568.pdfIn PDF document text
    • http://toxawilel.epizy.com/sunubujarowomugafowevu.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_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 5276 bytes
SHA-256: 973a5d5d2d668e3561b326b689808a1fa1b9c67db87a5921a6b045219581102f
font_01_sfnt_off0000fe39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE39 12604 bytes
SHA-256: 62625293d24bd46b9015ed8a44d34bb970a02b5d84d3eb223574db799c1d721c

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