Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08a333e277aff91…

MALICIOUS

PDF

88.0 KB Created: 2021-03-27 15:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8186209fa920944b8fb15383ae874e53 SHA-1: 934022f7444c729d8d11826ffdefed5dbcfcf683 SHA-256: d08a333e277aff91ccf9e7d81ba29639af656896f0d4d6bd93c55c02aeaae374
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as a document related to "similar triangles problems and solutions pdf". The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=similar+triangles+problems+and+solutions+pdf
    • https://cdn-cms.f-static.net/uploads/4468255/normal_601e124cce344.pdf
    • https://static.s123-cdn-static.com/uploads/4492915/normal_5fe49681597e2.pdf
    • http://leopards.space/loan_interest_calculator_excel_sheet7xgvk.pdf
    • http://nowtorrentz.com/polazkz0h8.pdf
    • https://cdn-cms.f-static.net/uploads/4416331/normal_60310d91478dd.pdf
    • http://reduslimitaly-ufficiale.site/cctv_camera_types_and_usesah9na.pdf
    • http://pshcomonhere.xyz/94321218394epsxo.pdf
    • https://cdn-cms.f-static.net/uploads/4405413/normal_601725c79abfe.pdf
    • https://cdn-cms.f-static.net/uploads/4375515/normal_6042d9d5ddef0.pdf
    • http://cmb-societe.com/essentials_of_medical_microbiology_free_downloadh29j8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zopenave/89022755884.pdf
    • https://s3.amazonaws.com/woxotopapozokev/safipa.pdf
    • https://uploads.strikinglycdn.com/files/7d92a01b-8e65-4a48-b923-4184a04edd3a/megob.pdf
    • https://uploads.strikinglycdn.com/files/e17c7c35-7788-4610-ae11-b63fee75ca2e/3018038080.pdf
    • http://jokokitot.rf.gd/psychological_aptitude_test_for_assistant_loco_pilot.pdf
    • https://uploads.strikinglycdn.com/files/8d8c07d8-d77f-4d4e-94bc-1909b697f359/nidovuxamizamepinoxaz.pdf
    • https://uploads.strikinglycdn.com/files/9a40f4c9-1a99-4bec-bc4b-0042bed9e674/zolajigegidoju.pdf
    • http://sazitoza.epizy.com/la_vida_es_sueo_cervantes_virtual.pdf
    • https://s3.amazonaws.com/vutame/69297546211.pdf
    • https://s3.amazonaws.com/safenalavojuwu/child_protection_nsw_mandatory_reporting.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cf.bin
90865ba3ce74359e290e7a0555e36bb0e8eeb75bbd3e5507afef1a23b34667a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 5484 bytes
font_01_sfnt_off0001053e.bin
3c42c20f17f0ff63d981440183d817ddb5450d1b7632391a836bbf21c2831a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 11540 bytes
font_02_sfnt_off00012cc2.bin
6fddfce7fc9c8161f9e19f64add1608c1d6458e22d63b0a48282c722c61a334e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC2 16236 bytes
font_03_sfnt_off00014230.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14230 4324 bytes

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