Malicious PDF — malware analysis report

Static analysis result for SHA-256 811078649053a72e…

MALICIOUS

PDF

100.3 KB Created: 2021-03-04 17:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e67f1270e9d5ad0577f8ec916f1b67 SHA-1: d137425fb2f14f926f71cf8e6f0011f2d53843f6 SHA-256: 811078649053a72edea29cba4260be791d0f547b87aa10ee1696d0249a5e50dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. The document's content, combined with the presence of external URLs, suggests it is designed to trick users into believing they have won a prize or are due a refund, likely leading to a phishing or financial fraud attempt. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://nipisod.ru/123?utm_term=what+do+you+need+for+commercial+drivers+license
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6030a2393c47d.pdf
    • https://static.s123-cdn-static.com/uploads/4375704/normal_6003f9e6f2cf7.pdf
    • http://train-home.ru/38642590273m3ofd.pdf
    • https://cdn-cms.f-static.net/uploads/4501045/normal_603a89fe79334.pdf
    • http://perevod-card2card24.site/calories_in_bubble_tea_with_popping_bubblessu31h.pdf
    • https://cdn-cms.f-static.net/uploads/4502246/normal_5fe975bcb608a.pdf
    • https://static.s123-cdn-static.com/uploads/4451035/normal_5ffa5910b5794.pdf
    • https://cdn-cms.f-static.net/uploads/4471109/normal_60370b6ac33cc.pdf
    • http://nenavukatebofaf.22web.org/xobomanabunam.pdf
    • https://static.s123-cdn-static.com/uploads/4480174/normal_5ff832f7dfe43.pdf
    • http://pifozuvarivin.22web.org/bilton_grange_school_uniform.pdf
    • http://birjand.design/gajisodogalakife7mxxh.pdf
    • http://shopsupergood.site/22826848718w5r4q.pdf
    • http://zofifajitazi.22web.org/segimisemolikabevupupam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8febb649-5353-4e89-ab20-ff82c60c0dc8/muwig.pdf
    • http://sopigovo.rf.gd/megewaziratafisapexe.pdf
    • https://uploads.strikinglycdn.com/files/a08b3401-e068-4702-90ba-ac8484203327/yamaha_rx-v679_remote_app.pdf
    • https://uploads.strikinglycdn.com/files/9ba674f6-57e4-4c3c-a22e-52ec26dfa5f7/nezipepasevudej.pdf
    • https://s3.amazonaws.com/mizeteb/zobago.pdf
    • https://uploads.strikinglycdn.com/files/b2ece391-a2e5-4183-b922-a50b3b2f1e0c/whats_wrong_with_the_healthcare_system_in_the_us.pdf
    • http://gimolarevakisav.rf.gd/48029221448.pdf
    • https://s3.amazonaws.com/dopugaxelelema/what_is_the_roman_number_of_5000.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_off00014827.bin
77276a1882753c5449963a5780bd353c3587b0597402f5e74a7ab4596f9c847d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14827 5436 bytes
font_01_sfnt_off00015a93.bin
743d779cf390f5f5a8cba6ce72d44a22e49678a81761049c5f751ac0d1a81a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A93 11936 bytes

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