Malicious PDF — malware analysis report

Static analysis result for SHA-256 db717dfc9df8e3b6…

MALICIOUS

PDF

90.7 KB Created: 2021-04-01 06:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a3a9ddcae34e3f1f213d9bb46ac3ea84 SHA-1: 291957d25721cb7cb493777927b19ff15ab44e90 SHA-256: db717dfc9df8e3b66d5d7799931be83cf58328351c90848a51e3a5b92f315cf5
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the delivery of a second-stage payload via one of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/aws?utm_term=projectile+motion+practice+questions+with+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418755/normal_5fce76c656b25.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/ZQhjdUa/46730456536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_6045d5a9b5113.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/bsc_marksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/a4gg9oj/89293073869.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/hi5TLcI/xirenapaguke.pdfIn PDF document text
    • https://pedogore.weebly.com/uploads/1/3/2/8/132815008/setivumuwafivope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449419/normal_5fe1fdc7f2919.pdfIn PDF document text
    • http://jovopomutulilo.medianewsonline.com/articles_of_confederation_webquest.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/2331493098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_6027b19e713cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_60528485e3688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_604f2f025e3e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450519/normal_5fdabb8332c5d.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/FgjQONP/swords_and_sandals_medieval_download.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/cibjjgj/rexudimagatu.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/gowomaziriwin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kusababi.onlinewebshop.net/gopelasinekitirokepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee60162-720e-4e58-ad4e-cc0a6f64a955/tirupovunibadebedozedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904f8569-c155-4b0f-a564-ebbc7ec96d80/9595910166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c974c6ea-6e27-4e43-a0de-7551656a2c6a/troy_bilt_self_propelled_mower_drive_belt_replacement.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/70527347073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537a7c43-9c57-477c-ba43-116560bc4405/18700921952.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_off00012343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12343 5468 bytes
SHA-256: 06aa30d483454d155adeca63eb4f10c0aaadc9b526131dc92add9db92322f10f
font_01_sfnt_off000135c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C6 11084 bytes
SHA-256: 368f9159b5c23c648fba80d2a1a678162c84311024bbbcd09c9d5b3be6668dbc

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