Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a046e2e43c796e8…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 06:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 90f5157df962d17a64d86fdba51f2d98 SHA-1: b0049ed0a71da348542d83618bb0814ab320a227 SHA-256: 6a046e2e43c796e86e88b48fa5bcbe145e56bb7be11962c7fa3e044ef623907b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body text, though heavily obfuscated, contains keywords related to 'iaaf world records pdf' and the authoring application, suggesting a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://druttle.ru/award?keyword=iaaf+world+records+pdf PDF link annotation
    • https://dogodomob.weebly.com/uploads/1/3/4/0/134017369/petajibor-zevinositilato-laminelakitanu-boligidipexe.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/punctuation_comma_exercises.pdfIn PDF document text
    • http://ralugugifoxatir.scienceontheweb.net/78748676128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fcddd0b1ce0b.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/histologia_del_pancreas.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/dr._jekyll_and_mr._hyde_summary_themes_characters_and_analysis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_600a733a263cd.pdfIn PDF document text
    • https://mofagobebaz.weebly.com/uploads/1/3/4/6/134633285/af824.pdfIn PDF document text
    • https://gudosotavuna.weebly.com/uploads/1/3/4/7/134722070/103456bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fdb75847b6a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_6022efa523f9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_5fcb533c9174a.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/puwalofajukavijes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_601afd9896cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60252ae118885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_6006bbe8debd3.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/describe_the_amazon_rainforest.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/5a035409-a2f5-470b-a137-fda41b8c78ae/kokuvogosuvimatanaxoguba.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/7812139274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a33ec0-65c7-45c5-9b3f-bd061b859ffd/logitech_k800_battery_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af9f4d7-aece-45ec-9633-a156e527cbcb/82260342049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ad9f6b-20a6-4ade-8171-44abf4b02454/leginexopuwumobatamum.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_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 5176 bytes
SHA-256: b0525ba41b6f980731fca05f8f7b390daaf9b2920b26dbe3c1535c3fa6c787ef
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 14332 bytes
SHA-256: 94882596ecd29436ee518391abc43f1db29d6fab127866be4e67a841cde9aa62

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