Malicious PDF — malware analysis report

Static analysis result for SHA-256 14747dbe88b7714e…

MALICIOUS

PDF

80.9 KB Created: 2021-06-02 07:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e22aa73ce37f4e6791f270f343b4d47d SHA-1: 189617305a8fcf72a730a7ebcdf34cae5dc31451 SHA-256: 14747dbe88b7714e2c866b582750021bbe19e011fee66add7d8543377ac5b1ba
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=company+annual+financial+report+sample PDF link annotation
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/zidamoziliguzolufop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_604f34435754d.pdfIn PDF document text
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/ludojolukofaxiz_gidaxizi_zufegodawapova_loxoxezomemezid.pdfIn PDF document text
    • https://juloxiwam.weebly.com/uploads/1/3/5/9/135967800/wimoj_lotad_nuxowakot_lalinowaxutomup.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/9c34065b-3159-4574-a046-5be42e9355bf/jump_rope_exercise_program_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6ad7cd-9493-4f52-852d-b72be632cda5/diary_of_a_wimpy_kid_free.pdfIn PDF document text
    • http://zufumegi.pbworks.com/f/23467806279.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/f/11210938881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059b9ff4-589d-4b5e-bdfd-270b9aa28280/pioneer_vsx-1123-k_price.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144416112/kipewaxi.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144438312/rudulosojomosiges.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144436719/tezorunesawijex.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_off000100d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 5168 bytes
SHA-256: 9abf1130fbd48405427ea826b2e1b65edf73c324cd41a5bbee5bb21239ce8281
font_01_sfnt_off00011256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11256 10800 bytes
SHA-256: f0f7d2ccd9ccf1ad51f72766a64623a09aa2fa6eaf75398b7dcc02d5ccf06b3b