Malicious PDF — malware analysis report

Static analysis result for SHA-256 75718ff3dd98f991…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 20:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c5d3dfb6ca7712e674cf33c70ecffae4 SHA-1: 76d241ca7ed885280476257ef6c1b29013350e8b SHA-256: 75718ff3dd98f9911a147487a0cfa8267c3981e93d551500eb4881bb7ea069b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting a tactic to drive traffic to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a malicious document designed to exploit users through deceptive content and potentially exploit vulnerabilities.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/award?keyword=convert+pdf+to+dwg+autocad+2020 PDF link annotation
    • https://cdn.sqhk.co/jagapifa/QiGanhi/minion_shooter_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/bQgcmSj/tejoj.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/eEqjbOR/xunijugofekopamosode.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/jhgcVgf/bubble_poke_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/iVifrKF/kids_kitchen_set_target.pdfIn PDF document text
    • http://a-trvl.ru/pogadugareahwk1.pdfIn PDF document text
    • https://retetozatinum.weebly.com/uploads/1/3/0/7/130775023/nijefilerijas-fopuxad.pdfIn PDF document text
    • https://vuvitolivudiru.weebly.com/uploads/1/3/2/7/132712253/6576054.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/cmOajjV/48610695155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_6028ee5a72fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fd0ad9028989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_602e0dd794a8d.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/ihfsOia/vapinavas.pdfIn PDF document text
    • http://idealica-tufficiale.website/looming_in_the_shadows_pokemon_go_guiderafn6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_6011854c29310.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/rabewiruzitewa/xejulagi.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/xiwimidi.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_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 5444 bytes
SHA-256: 91c1b441d0baae3d35ace9a55edc8907bfbd1ef12ea6b33424c1ee134ad13c4d
font_01_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 10016 bytes
SHA-256: 24bdf55c3f99cd50e7528c782fea18deb37ded9a02c7400414b2b982515d49c4

Open this report in the interactive analyzer, or submit your own file for analysis.