Malicious PDF — malware analysis report

Static analysis result for SHA-256 e238acbde63548d8…

MALICIOUS

PDF

71.6 KB Created: 2021-09-11 04:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5d87d614528715b55e3bcc765b93bac5 SHA-1: 49eb632ed7d59ba107c640c0bf3d930a3bb2719a SHA-256: e238acbde63548d8cfe7eefcf235ead099bb964241037fb0841bf82a7379acc3
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple external URIs, including one pointing to a raw IP address, suggesting it's designed to redirect users to potentially harmful websites. The presence of numerous links on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://gotoko.com/cmsv2/upload/files/saziviwapiwixiraruk.pdf In PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/0bff5fcae094109d04937f6126165faa/38593751109.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/sedodal.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/nagamatirozedosidufanami.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/14539447464.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/93858873596.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/noduw.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/48387763794.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/28503128945.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/nimat.pdfIn PDF document text
    • http://xhzhengli.com/upload/gekuwojetomu.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/25728412615.pdfIn PDF document text
    • http://termocity.by/pics/files/dijetafikemelizuro.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/regeso.pdfPDF link annotation
    • https://trvstore.com/userfiles/file/4032965952.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/96091227456.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/wadigirutorar.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/7553233477.pdfIn PDF document text
    • https://medpressa.ru/files/file/fenokegapavofuxejelesaf.pdfIn PDF document text
    • http://denge.aero/upload/files/98533447641.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa7086695c---87873691510.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/93412034304.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/15385288358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=driving+academy+india+3d+mod+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB981 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 15208 bytes
SHA-256: 3d3650a45bae2a87df94dd6c93d5ab07cb0bacc956e363583337560562f76295
font_02_sfnt_off0000f7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F6 10992 bytes
SHA-256: 144e21084e78f3bf56653a356e7bb93451b87fcd01fc22fd4cd9c42b09140cab

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