Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fac063cd7e081c2…

MALICIOUS

PDF

77.3 KB Created: 2021-04-26 08:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7def8b3d74de2b87a302038c2197f9ce SHA-1: edf6e248991463a13a5fc692ed47f7852ab3effc SHA-256: 9fac063cd7e081c288917f90c2a2c8bd6bb0c80308790f8f3dd786a89dc27dab
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or spam document. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://xezojetit.ru/strik?utm_term=game+theory+in+simple+words PDF link annotation
    • http://koponegigat.medianewsonline.com/natiwitubexevinewosa.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/6741788.pdfIn PDF document text
    • http://mepamoso.sportsontheweb.net/analog_and_digital_circuits_lab_manual.pdfIn PDF document text
    • http://lugodapamaj.mygamesonline.org/xofexixaregatuw.pdfIn PDF document text
    • http://899themes-demo.ru/notebook_paper_template_wordhbez5.pdfIn PDF document text
    • https://baluwakenina.weebly.com/uploads/1/3/1/4/131437578/bd5ee2d80.pdfIn PDF document text
    • http://luminar2-download.xyz/re_zero_light_novel_wikikfzs7.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/wigobexowipal.pdfIn PDF document text
    • http://butalinonoruma.scienceontheweb.net/fever_and_hyperthermia.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/r_programming_language_crash_course.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/13660562183.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/6cffe4bb-c55c-482d-87ea-48e8f7b71911/tp_link_tl_wr702n_change_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d0a112-2c52-4cab-8f33-fbc405a19743/67925793865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2b2637-82fc-4db0-8abe-07c0be9fa606/55150620693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b231d79-f354-4d51-bb86-a1f6528dd13c/lokiloxoseligazufukimelu.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/strength_of_materials_for_gate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f86a5f-999e-4e22-8755-f981c9ff0b21/79026088401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11243a5c-f646-47d3-b90c-841f41ef8485/savage_worlds_deluxe_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2472c78-0edb-4991-bcde-6ed8e11486ba/pathfinder_kingmaker_octavia_romance_guide.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_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 5424 bytes
SHA-256: 5e4680e9efd660ca90451b86c9fdc5c9ffe65250d3b084e0dac6b4ccbf99ffac
font_01_sfnt_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 11684 bytes
SHA-256: 57aa10e0d09752778145b526397096bae3ad66dba3e664a74ecb1c704185ab5a

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