Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bab04d64cce3a5…

MALICIOUS

PDF

69.5 KB Created: 2021-03-25 10:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b524545420887416a0723e11426d969f SHA-1: 3456ed72f43229837f2de4932575fbc2912a5803 SHA-256: 93bab04d64cce3a5f43003e7c3d4e3fcdbabbfcc4c8ec7041378b18c68a71717
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that redirect to various disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=cuisinart+grind+and+brew+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/ragojagef/cgjhjU2/gulafexasajifefeka.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/jcGY2of/lubufobumikek.pdfIn PDF document text
    • http://stroy-level.ru/game_booster_androidrrbxs.pdfIn PDF document text
    • http://christinaanddavid2019.com/creader_professional_crp123_software_downloadqz3at.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fcf86bd741dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6052e461d467c.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/cgfXihM/93703693839.pdfIn PDF document text
    • http://vodoroding.info/dragon_age_origins_denerim_questslisut.pdfIn PDF document text
    • http://itnegozio.info/z-table_statistics_positive_and_negative6h1rc.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/c3Xjhf0/critical_ops_hack_apk.pdfIn PDF document text
    • http://tonerinkstore.com/2477470264pba14.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/1zjb5Tp/93881260343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_60317615205e0.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/gghF5hd/nulovozigezetijimifixu.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/dj1fibI/mabaja.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/hgcpPgj/gevaduzefedusug.pdfIn PDF document text
    • https://cdn.sqhk.co/loxexafetivu/gc2jfmz/mars_weather_api.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/wopari/alone_movie_video_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/aflac_accident_policy_wellness_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/what_is_a_metaphor_for_christmas.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_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 5396 bytes
SHA-256: ec4542767950a6c0653ed305ad3fb3c2b75b2a837f3cfaa6f84cb60c5bc77aa9
font_01_sfnt_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 10476 bytes
SHA-256: 84ae5ae27b6feb89ab72b15389dd1bde89fb595544040f91e7e6f5c6d0c6816e

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