Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a592a2d11d4c0c2…

MALICIOUS

PDF

83.6 KB Created: 2021-05-15 20:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d0a4b119030ae27f5cb227324035082c SHA-1: 9e94e17b59c279cde0ae46643e91bcc2167ba8e4 SHA-256: 2a592a2d11d4c0c2f56452a65090d05fb7b9a9a67358734a4920a52f956e3a37
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by heuristics and ClamAV. The document body, though heavily obfuscated, suggests a lure related to 'trivia questions and answers', which is a common tactic for phishing or malware distribution. The presence of an external URI points to a likely attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=remember+the+titans+trivia+questions+and+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414491/normal_60526de0d79c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417029/normal_5fc9340684643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_6065496e5f1f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445320/normal_5fe3b41feace5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_6003d57d46c54.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/hdjDgge/among_us_emergency_meeting_button_sound_effect.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/Xhjihiz/smart_update_manager_sum_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6028876251ae7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fed3f791ad09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489057/normal_601a0178c9c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_600aeecc7b59b.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/RYuiizY/90662966415.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/hImngkp/84709182555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_e151b0acda45490d8fa186dae6751dec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/givovuwov.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/bigger_leaner_stronger_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/64280090482.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_6405159f9c7c4c4790fbff0a8d3cd1c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mijumomub/fijadepewafupolux.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/32397316371.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/rehras_sahib_path_download_djpunjab.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_4f8b0a72f57d47c4820ed32443ae8d99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defujo/nefutogutonetikemid.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_2c55891cf6a249ce809e0b449cefc5a2.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_e041993a20e2470d8bfd87ff616cb0b0.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 5460 bytes
SHA-256: 4a2e75e4fe44113972a9dcb318ba1abd5c861f460cc6df91054b5533b0c1bda3
font_01_sfnt_off00011a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A46 11392 bytes
SHA-256: 9b6a15c3a593f993ea0a5105eaf291adc7b143279be1ebcefdbd70065f1fe0a9

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