Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e96e975af59ae7…

MALICIOUS

PDF

77.0 KB Created: 2021-03-03 07:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aa8e143069aa3b86ebc138ac37707c66 SHA-1: 873b7657ce692e274b20d771ec3d4916ad758123 SHA-256: 26e96e975af59ae7163e34ced415f19d4d4ed75c41c79b5307afabed403d0b1e
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=how+much+does+a+jag+officer+make In PDF document text
    • http://rolivazugatar.scienceontheweb.net/minecraft_electric_kinetic_generator.pdfIn PDF document text
    • http://yourbigdick.space/leg_rope_length_guideagl4g.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/speed_queen_dryer_vent_size.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447273/normal_5fdccf86a5531.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/50327880564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_602626e980cc7.pdfIn PDF document text
    • http://help-nanny.site/titans_cursefphnl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_6031f5572fbce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_60190c06e1f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_5fd878a9b57cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5fec96fe2e44c.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/46496600872.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jalijoruki.atwebpages.com/how_many_carbs_in_burger_king_medium_onion_rings.pdfIn PDF document text
    • http://jupuzagap.rf.gd/vastu_shastra.pdfIn PDF document text
    • http://mujujum.epizy.com/xmanager_6_free_with_product_key.pdfIn PDF document text
    • http://fazomexaboru.rf.gd/borland_turbo_c_3._0_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32B 5292 bytes
SHA-256: cb56ab7f7750b3a34c43021259e2af4901531d134ce3826f104b7b1e60ef8a2a
font_01_sfnt_off0000f53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 10436 bytes
SHA-256: eae1039fd9d2de55472aa76ff06e0e41625f6f5b5606549f41e1b98ecab1a534
font_02_sfnt_off000118eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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