Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a3bc8d4297465d…

MALICIOUS

PDF

71.4 KB Created: 2021-03-22 19:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 739c6c4b2adc6bc3d0f64587ba822fd1 SHA-1: ae15ef29b94c64c13cc1609b04b3df9cbfc95512 SHA-256: a0a3bc8d4297465d4a71bdd902cbcb327a5c8de012526e92355b762bc4effaa1
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing or trojan. Heuristics indicate it contains a callback phishing lure, prompting the user to call a phone number, likely to trick them into revealing sensitive information or making payments. The embedded URL points to a domain associated with this phishing attempt.

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
  • 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://pelibifir.ru/strik?utm_term=bushnell+neo%252B+gps+watch+manual
    • https://cdn-cms.f-static.net/uploads/4374847/normal_6014021edfe33.pdf
    • https://static.s123-cdn-static.com/uploads/4411696/normal_600354dcc77d8.pdf
    • http://xenejesujotolud.mypressonline.com/munugekibekeb.pdf
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fdafeb211da7.pdf
    • http://gelokan.sportsontheweb.net/8496538275.pdf
    • https://cdn-cms.f-static.net/uploads/4390660/normal_602647cc1ead5.pdf
    • https://static.s123-cdn-static.com/uploads/4445743/normal_5ffe2d9cc39b4.pdf
    • https://cdn-cms.f-static.net/uploads/4445743/normal_5fdc462c23c15.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_e4bc545fda57438f903384f567f84b06.pdf?index=true
    • https://2aa0b900-127f-4603-a19a-6a731d3c9eb1.filesusr.com/ugd/5eaffa_dca8628f5f8a4173829d9374b20547c5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6f0eb112-8bcc-4200-b1e0-c393540fac1b/who_really_runs_the_federal_reserve.pdf
    • http://dezinolabebosod.atwebpages.com/jack_lalanne_power_juicer_express_cleaning.pdf
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_2888595f83734d9bb97d793e36060d81.pdf?index=true
    • https://uploads.strikinglycdn.com/files/361b9f5c-d993-4b21-a202-7754e107d0cf/zudubaxusigineruzotenu.pdf
    • https://uploads.strikinglycdn.com/files/06819362-59c1-4636-a541-ab049a2cfdc9/king_of_my_heart_deutsch_chords_piano.pdf
    • https://uploads.strikinglycdn.com/files/6cf9fa0d-01db-40f6-85ee-6132a0585560/34672634066.pdf
    • http://varirojemixu.myartsonline.com/vopamamavada.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_off0000d7e9.bin
20ecfb3b790cf7f5e2aa8e440eb300f8ba76438b227e3bac66c4d2ac0b7fecf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 5392 bytes
font_01_sfnt_off0000ea39.bin
13bb18b86a15c89a689f2eb3fe510a0633194dacd5b3f68f26a811c78dbbe8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 11288 bytes

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