Malicious PDF — malware analysis report

Static analysis result for SHA-256 362377751bd3633b…

MALICIOUS

PDF

63.9 KB Created: 2020-11-21 07:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c6e55771d5ac76935b48e52e313a02a SHA-1: ef46282f6b2b9c2fd8c8860066b9e0831cd71825 SHA-256: 362377751bd3633bc9181e2c6a0e222fdead533acaf5bb6b4bb580f634606755
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a known malicious redirector. The heuristic firings indicate this PDF is designed to link to a large number of external resources, likely for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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
  • 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://gettraff.ru/123?utm_term=raven+biology+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4450249/normal_5fb849d601d2f.pdf
    • https://cdn-cms.f-static.net/uploads/4452395/normal_5fb8481be15d0.pdf
    • https://cdn-cms.f-static.net/uploads/4447108/normal_5fa779ef5b7e1.pdf
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/limekawavuv-fukif.pdf
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fa1721d88571.pdf
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f9e0f5faf35f.pdf
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8a300e1d435.pdf
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/masavala.pdf
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fab02f1d5597.pdf
    • https://xijoxamapapi.weebly.com/uploads/1/3/4/3/134337958/duzabegi_mivotokamov.pdf
    • https://vefotufujipewux.weebly.com/uploads/1/3/4/4/134401009/4105950.pdf
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f8d752950aff.pdf
    • https://fojumujitugesi.weebly.com/uploads/1/3/4/6/134688065/509088.pdf
    • https://juvirafiwak.weebly.com/uploads/1/3/4/3/134307718/dolipi_lotujemoj_nojosonete_visudapotir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a5bca3db-bc44-4038-aeda-f9235c5787b9/city_of_flint_income_tax_office.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b107.bin
29cb60a155dd83cd425cc73e3e96ccc736ae6b11ad09aed5e40b21a986569d7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB107 5140 bytes
font_01_sfnt_off0000c2a2.bin
61875498ff6ccb4fbf87d50d4562a6f2cbc2ac32043152af8cc893dedb358daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A2 10024 bytes
font_02_sfnt_off0000e4bb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BB 4324 bytes

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