Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd76a92edd7d588d…

MALICIOUS

PDF

78.4 KB Created: 2021-03-31 19:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76450a1bfe9b90a04ba0a1eb16384c3 SHA-1: 43da2b92bd999ed57aaf9455328c8a9893b1544b SHA-256: bd76a92edd7d588d786fd0143df091c93a6aeb50d130505482d99592885cf45e
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with one URL specifically matching the document's apparent search query. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/award?keyword=gram+negative+bacteria+examples+pdf
    • http://sfr-webmail.com/98545420274pecjs.pdf
    • https://cdn-cms.f-static.net/uploads/4453579/normal_605ba136e0a61.pdf
    • http://thiswaytovogue.com/how_to_replace_lid_lock_on_kenmore_washerynree.pdf
    • https://cdn-cms.f-static.net/uploads/4405179/normal_602a328298be7.pdf
    • http://eurostore.info/gjj_hoist_manualgpml2.pdf
    • https://cdn-cms.f-static.net/uploads/4366364/normal_605f1a5caf8ac.pdf
    • https://cdn-cms.f-static.net/uploads/4450876/normal_605fabdfad867.pdf
    • https://cdn-cms.f-static.net/uploads/4446491/normal_601ecaef46415.pdf
    • https://cdn-cms.f-static.net/uploads/4384046/normal_6024ba761cfea.pdf
    • http://vijevejumozugim.sportsontheweb.net/bodybuilding_exercises_book.pdf
    • https://cdn-cms.f-static.net/uploads/4452845/normal_605fdd4264b7c.pdf
    • https://cdn-cms.f-static.net/uploads/4471710/normal_601ffdbbd7bdb.pdf
    • http://pawusewi.sportsontheweb.net/30939916902.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/safago/36809484483.pdf
    • http://nejimafalun.onlinewebshop.net/wujilibojugasomam.pdf
    • https://s3.amazonaws.com/xidazeze/limivigezavot.pdf
    • https://s3.amazonaws.com/lazesej/what_are_the_essential_elements_of_life.pdf
    • https://s3.amazonaws.com/vonusirukete/runasefidimod.pdf
    • http://kugukokoner.myartsonline.com/30270126485.pdf
    • https://s3.amazonaws.com/tikofaketonub/lujonebolew.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a8.bin
971248f549972b7cb6e27ae12eec4743afd6323cf82af12003f616429923bc3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 5772 bytes
font_01_sfnt_off00010744.bin
fbbe81a13b2a4f801b427f27501997bf5957afb4593fcd0f572b9a65e4e0f11e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10744 10940 bytes