Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ca26ea2480e3e8…

MALICIOUS

PDF

75.2 KB Created: 2021-05-06 17:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 48e531086938c4649736af28ae4d7e3c SHA-1: 2779e22e830c38b45f3ea883164e7364b506b767 SHA-256: f8ca26ea2480e3e8ab2bbbaa7dff804f532864c9d142e64cfc95186b3f0d07ab
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain ('dugedepap.ru') that is likely used for phishing or malware distribution. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to car parts, suggesting a lure to attract victims to the malicious link.

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
  • 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://dugedepap.ru/strik?utm_term=toyota+corolla+2016+battery+walmart PDF link annotation
    • http://mobeditobaxul.scienceontheweb.net/advanced_excel_training_in_bangalore_koramangala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499021/normal_5fdab1195a8c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374364/normal_5fed8ee93bd1b.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/iRwphia/72381710988.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/ZjbqYie/medical_certificate_format_school_admission.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/iSgcomb/suzofewimog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_5fd8708011b7e.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/2095002599.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/78908982467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5fea31dd9f24c.pdfIn PDF document text
    • http://penexej.mywebcommunity.org/barreras_contra_la_comunicacin_eficaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a2214900-82f6-4ed5-a432-d5ffd14110fa.filesusr.com/ugd/306b6b_7a585fd8e89a4d3c87bb8c3e0d3a1906.pdf?index=trueIn PDF document text
    • http://tulifal.onlinewebshop.net/helicobacter_pylori_resistente_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/23177886107.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/31845408486.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/plantronics_voyager_legend_bluetooth_headset_schwarz.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_f8261794aa8744fba21b9ef333271805.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_c9d10e4a2f054a3a953a55e14c5188e6.pdf?index=trueIn PDF document text
    • https://151dec52-cf20-477b-a401-a68195eead79.filesusr.com/ugd/8538f4_ae58bfd4b9034a37949bd5b98fdff1f0.pdf?index=trueIn 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_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 5532 bytes
SHA-256: fd03af639f75a0a981da4c8c09d2ebf91b92138565398e58130862eebefe7cb8
font_01_sfnt_off0000f9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 11168 bytes
SHA-256: 35e68042572a3f81d4dcd96b5857437935c6da6c75e692bc00a4290dd12aaeed

Open this report in the interactive analyzer, or submit your own file for analysis.