Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d59894f8cb3307…

MALICIOUS

PDF

77.2 KB Created: 2021-03-13 15:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83bf4e6e0bc31da972accf54e15bba5f SHA-1: 086777d3dd1215630c5058d22b6cbdeaa9d2ab35 SHA-256: 59d59894f8cb3307e854e0469f9aa3eb65ffd559c02eeb6dd896046bd80e7a7a
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to drive traffic to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=oddworld+new+n+tasty+apkpure
    • http://wusejopajaxus.22web.org/is_beats_better_than_bose.pdf
    • http://glawerry.online/nuxamuvikavixuberwt1x2.pdf
    • https://static.s123-cdn-static.com/uploads/4458634/normal_5fddb02f0869c.pdf
    • https://cdn-cms.f-static.net/uploads/4369306/normal_6036493568567.pdf
    • http://boomerangoo.site/brochure_template_in_google_docst68l9.pdf
    • https://cdn-cms.f-static.net/uploads/4480402/normal_6036cb7a3ac6a.pdf
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fd75687b02e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_7fc2eaaaa3414abc95863404b6c03b09.pdf?index=true
    • https://058da8ce-bb30-4b8c-81eb-8903018cac65.filesusr.com/ugd/ab745b_a4767e671c144c1789e27ecc24055b02.pdf?index=true
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_695efdbe0fbf42a3a13c9826e470a89a.pdf?index=true
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_473fe249effe43488b0fe1442dee2bcf.pdf?index=true
    • http://nesozupedoxexig.epizy.com/41083284725.pdf
    • http://xugivazule.rf.gd/fantastic_beasts_and_where_to_find_them_film_3.pdf
    • https://uploads.strikinglycdn.com/files/a5efe5d0-287f-4d85-a16b-e84b0b85ee25/92904586624.pdf
    • http://gotazuvibidok.epizy.com/7934278997.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_8255fb203a95403d8fc003e6449c4834.pdf?index=true
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_228802b452e34563ab112b0d1197cbad.pdf?index=true
    • https://uploads.strikinglycdn.com/files/54ad79db-641f-4245-8707-b3168ff613bc/33706398251.pdf
    • http://xuposusan.epizy.com/direct_and_bending_stress.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05d.bin
f7443f059ab006875369ada61d8710eac5404be7b4fa81acaca904f79248a3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 5236 bytes
font_01_sfnt_off0001024e.bin
f9ad8a916f1dc856a2baa7681dceaf1dfa54843e3c05a79424a19bb48ab0417d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 10784 bytes

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