Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a9bee8cdfd8044…

MALICIOUS

PDF

168.2 KB Created: 2021-04-03 10:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c56f22f752b73140a44e2fbcb4ce95e0 SHA-1: 9d6ae96c264e43825b23ec9c9f0b089c2dc0f3de SHA-256: 76a9bee8cdfd804444719577ef1d51ffb935a8f6a238e48a33778fa7fa1d2e0b
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and a phishing/trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick the user into calling a phone number, consistent with tech support scams or fraudulent billing schemes. While no scripts were explicitly extracted, the presence of embedded URLs suggests a potential for downloading further malicious content or redirecting the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=chestnut+ridge+middle+school+mascot
    • http://fafikup.scienceontheweb.net/metric_bolt_size_chart_uk.pdf
    • https://cdn-cms.f-static.net/uploads/4488815/normal_60555dc0880dc.pdf
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fe4f18ce24c1.pdf
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/ligarosakexenam-rifuf-lukezoninew.pdf
    • https://zusamazoboxo.weebly.com/uploads/1/3/4/5/134527389/bb6208bc979487.pdf
    • https://cdn-cms.f-static.net/uploads/4460461/normal_603c089756277.pdf
    • https://sadejakudabad.weebly.com/uploads/1/3/5/9/135965210/buzoliwozevojize.pdf
    • https://cdn-cms.f-static.net/uploads/4476268/normal_60624c40072a6.pdf
    • http://gelufose.scienceontheweb.net/99370364514.pdf
    • https://takozuvixisuwet.weebly.com/uploads/1/3/4/7/134716687/tapulorobaben_xerirew.pdf
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/47e8b37.pdf
    • https://cdn-cms.f-static.net/uploads/4426410/normal_6037fd60a49d1.pdf
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/fixobatuvev-guginavatosarag-sarumajinaj-waseruvitup.pdf
    • https://roturusuwanowus.weebly.com/uploads/1/3/4/3/134363773/nadarexomov.pdf
    • https://cdn-cms.f-static.net/uploads/4383165/normal_605f840f523ba.pdf
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5fcc0f56b6790.pdf
    • https://cdn-cms.f-static.net/uploads/4497359/normal_6057c8023c781.pdf
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/xopavi_budedejeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gevapugono.atwebpages.com/the_ancestor_s_tale_richard_dawkins.pdf
    • https://uploads.strikinglycdn.com/files/99b9d619-41f0-4219-8503-e6a8f04121f0/sullair_185_air_compressor_parts_manual.pdf
    • http://madigekole.onlinewebshop.net/occupational_safety_and_health_act_1970.pdf
    • https://uploads.strikinglycdn.com/files/4f1b0d91-3443-4a6e-b0dc-45d9d721a05b/96018073474.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_off00025993.bin
bd542bc362a502e81b3587f844f2122fec371e20fddff1dc8e3def9ca5891dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25993 5260 bytes
font_01_sfnt_off00026b3d.bin
c9348c8790d972da0b5db5806e40aaecf4f6f52f2756af5d3dd80f904733f3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26B3D 11756 bytes

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