Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cf1e9d86292ead…

MALICIOUS

PDF

76.4 KB Created: 2021-04-07 03:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6431f674309e2d57e18672cdd56619a2 SHA-1: aea545d2d3563bc3efefe55a9ec7c9fcac5ea211 SHA-256: d4cf1e9d86292ead2ac74717c1d1e604856147cb027914072b283826f2f3e818
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a URL promising a game download. ClamAV and ML classifiers strongly indicate maliciousness, specifically phishing and trojan activity. The presence of multiple embedded URLs, some of which are associated with potentially unwanted content, suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=madden+mobile+16+apk+download
    • http://magefaro.22web.org/dr_browns_natural_flow_bottle_warmer_manual.pdf
    • http://rudajudo.iblogger.org/gamasuwemuliwiligafugis.pdf
    • http://melidagerukebel.sportsontheweb.net/pajon.pdf
    • https://cdn.sqhk.co/geroterunetu/ae93wlv/my_talking_angela_game_download_please.pdf
    • https://cdn.sqhk.co/zinumazak/ehegehc/counter_strike_2d_game.pdf
    • https://cdn.sqhk.co/vegedusovo/jjjgjeX/39188255105.pdf
    • http://forovasax.medianewsonline.com/32809843651.pdf
    • http://rivokalodusi.sportsontheweb.net/french_adjectives_rules.pdf
    • http://sefexetewizu.iblogger.org/70404385414.pdf
    • http://natikolom.site/27250755262s597w.pdf
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6026529b1d10b.pdf
    • https://cdn.sqhk.co/wememiguw/NijgeJ3/68317866425.pdf
    • https://cdn-cms.f-static.net/uploads/4481409/normal_60251b0800cef.pdf
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5feb531e6d909.pdf
    • http://trysoda.club/19641303132i01b4.pdf
    • https://static.s123-cdn-static.com/uploads/4418786/normal_5ffe9018432e3.pdf
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5feb94495527b.pdf
    • http://vwwv-avito.online/putigigt2rnh.pdf
    • http://uptodate.site/31210715855c03s6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rovizomaguwex.atwebpages.com/maltose_structure.pdf
    • https://s3.amazonaws.com/niporofez/kuxadu.pdf
    • http://ziwivazud.onlinewebshop.net/effects_of_globalization_in_kenya.pdf
    • https://s3.amazonaws.com/wiremeresegikon/92803288139.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_off0000ee23.bin
fa3ccc8487ec00c76400eb8afdc82690a2eba81135602d794622446ff9cf825b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 5340 bytes
font_01_sfnt_off00010057.bin
388f3f035e68172922ec7363285fc4266979b058947d05dd6c361e323dd9f53d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 10564 bytes