Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b7eea79fe5b882…

MALICIOUS

PDF

46.2 KB Created: 2020-11-01 10:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5d1fa31a57069d99da7249a5b2d74ce2 SHA-1: ef1aff69a5ffb391ef17b898fa6581a6e47d245f SHA-256: 94b7eea79fe5b8821fb90aaadb8f0c2f6dac813a88df305373e45e746fbd9f6d
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains URLs that are likely part of the lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/aws?keyword=the+5+wave+book+summary In PDF document text
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/tejuvitugalu_xadadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f93af35b4def.pdfIn PDF document text
    • https://pumewigegokofav.weebly.com/uploads/1/3/4/3/134317234/lodow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f9502fbda6b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_5f9bac0825fcc.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/kexonedupubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5f8f91753ade3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f9d15f83b514.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/memul/watertight_doors_on_ships.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/flow_of_energy_in_a_food_chain.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/93726936584.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/to_see_in_asl.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/country_flame_pellet_stove_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cf187c-5b60-4ff7-bc53-1d55830feb93/10329255317.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/vumisudimemizisiwagotavol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a174e4-34ab-44ca-97d3-9cd239e6a51c/advanced_dd_dungeon_masters_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_off000074d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D6 5424 bytes
SHA-256: 1cd4a03503d6dcafa9678030724caf4e79106049ec120f7bd4ab24bfca13c8bb
font_01_sfnt_off00008740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8740 10880 bytes
SHA-256: ad9a75cd805cd8df16c69d3b7647c21b07b09b56324001efc468c7e642890ca3

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