Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a319db6ef230c4d…

MALICIOUS

PDF

78.2 KB Created: 2021-04-13 23:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 28fefab7cf4bf35241288b463d8ca4ad SHA-1: e5d9fa9ea371ed66ecf443df78f400c1a5538ff1 SHA-256: 0a319db6ef230c4d962ecb99bbc971b9d9da51a007119993315665819565a1d2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including one pointing to 'baarspo.ru', suggesting it's designed to redirect users to potentially harmful content. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support a phishing or malware distribution attack pattern.

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://baarspo.ru/strik?utm_term=how+to+connect+jam+transit+headphones PDF link annotation
    • https://cdn.sqhk.co/danopefasuf/bhghbZS/current_airman_s_information_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/eggVRgi/31127484013.pdfIn PDF document text
    • https://cdn.sqhk.co/viwitukaz/Pfibhb2/diwifedaden.pdfIn PDF document text
    • https://vomomojivebaju.weebly.com/uploads/1/3/4/5/134599032/7348646.pdfIn PDF document text
    • http://xefakuwejufo.iblogger.org/academic_definition_of_information_and_communication.pdfIn PDF document text
    • http://idealica-ituficiale.website/978022413762es8m.pdfIn PDF document text
    • http://nukadaz.iblogger.org/44670178170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489593/normal_601e3fdd93957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_604ca4fbc2f50.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/jiajaif/geometry_alternate_interior_angles_worksheets.pdfIn PDF document text
    • http://lady-bug.club/lodatowojudagujanuropazuvanads.pdfIn PDF document text
    • https://zasevolonuto.weebly.com/uploads/1/3/5/3/135335071/ae19872.pdfIn PDF document text
    • http://obschee.xyz/786377470884u0as.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_6014933c0ea40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobaramitutukox.rf.gd/bepepazowuvij.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/jipizoxapalorijuvusif.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/pigeguxepikezanituzisa.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/anime_slayer_apple.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_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 5412 bytes
SHA-256: 313452df453fd7e39550f0bf4dcbab20f8cb2953299c7958fc813986b1748de2
font_01_sfnt_off00010553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10553 10688 bytes
SHA-256: cc95c39b7f9fce2632146e0bac7db20c4e0d90cacaf193a4d73f49fd8fd771c3

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