Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bdf0365bbe4f94…

MALICIOUS

PDF

86.4 KB Created: 2021-03-29 23:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ab9590984ad09275f0e87bdd73271599 SHA-1: ce054cd70a9ea7c7f759fbfa54f718de1f5dd6ba SHA-256: 12bdf0365bbe4f94203f475c019ba0e3760c99c6516fe1b375c143f7395a0d47
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/123?utm_term=drumore+links+text+guide PDF link annotation
    • https://cdn.sqhk.co/gofuzurafano/g9jhcZT/78340210591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_604b1f46827f7.pdfIn PDF document text
    • https://jopizogado.weebly.com/uploads/1/3/4/3/134317888/6600415.pdfIn PDF document text
    • https://komidozikozapuf.weebly.com/uploads/1/3/1/4/131455883/3805208.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/7026214.pdfIn PDF document text
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/94a683dcbb26f3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413000/normal_5fecfc8aca07a.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/nii7pjj/83831799157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_600cb3e04d4ea.pdfIn PDF document text
    • https://lomixefewagad.weebly.com/uploads/1/3/4/5/134592496/bb34ebfaa26a1.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/snjijaT/legowenutatubenut.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hhCVtoB/undateable_tv_show_trailer.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/60663841283.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/lixuduwonifa/church_information_desk.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/vimenokafaruvi.pdfIn PDF document text
    • http://vixugow.epizy.com/bio-_data_form_for_marriage_proposal.pdfIn PDF document text
    • http://wusojomirewo.epizy.com/dd_5th_edition_paladin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/salary_increment_appraisal_letter_format.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 5068 bytes
SHA-256: c9e651e1b638ed1df4b7823791830c6ffb21f3eb49efdaf631eacab742d7d4d2
font_01_sfnt_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 2748 bytes
SHA-256: dc2bd8bc3f1fbca52487cb4d288be96e9e1e5eabc446a14230c2a472a7e6f83e
font_02_sfnt_off00010ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA2 11364 bytes
SHA-256: e32c737db3b6cb1d6f803d395f61980b170a4d6b9c18d5284e6120de66c20395
font_03_sfnt_off00013576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13576 16464 bytes
SHA-256: e919af2fb6e128c46f0385bf2ae902ab55f70efe85756bef4aeabe42e33c4dc4

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