Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67cb8f4cb922be1…

MALICIOUS

PDF

71.8 KB Created: 2021-06-21 11:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b6cdac53127d02fb4d0e9b0e2caceb7 SHA-1: 78c2fd7826d0a3e93bbfaa035aa2e668dad20841 SHA-256: a67cb8f4cb922be191723907f376e43a630b9d010d55ed5c7e55f495a4f7e029
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to potentially compromised WordPress sites and other domains. The presence of a 'car parking hack money apk' UTM term in one URL suggests a lure for potentially fraudulent or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=car+parking+hack+money+apk PDF link annotation
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b9496448d445710ffd86c29a637fb734/29931575054.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/zaguvemefogadalazasu.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/70220524835.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/e3bfefabe6a96dfb7e5f5fcbd28de574/43528753494.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae058b850---webodimudejuxorex.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/a647e52cfe8f95bf59b2eb427bc61749/1559831358.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160add1c769bea---85488510450.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dfd2cfe31---misovejofujuvafabepovil.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/n8jsltdj8uprncngqor659ram0/98099048338.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/8815487069.pdfIn PDF document text
    • https://artbynela.com/uploads/file/zitol.pdfIn PDF document text
    • https://faceless.me/userfiles/files/73601988974.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3dd787a77---69530677976.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/p6su9ahf5oucl264u3vohua4ml/bapixetuvufigo.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/sojowexivizuxivubujizarun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 5208 bytes
SHA-256: c44f06ef12a31b18e8d15957bc2cc716d01279d671438130d1a07e5b9d5723f4
font_01_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 11272 bytes
SHA-256: 22514250a4fa941e9fec1831f38b13529a49de1d2e0b55ee4e227da482ff754c

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