Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f20a3bfaef1be16…

MALICIOUS

PDF

82.0 KB Created: 2021-03-25 10:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 22ad7daa805a41c8e612d50a7c56b67f SHA-1: 016498eee1e63ba30f24e31e94c8e31021ccd9dd SHA-256: 7f20a3bfaef1be16ef285a2d1301078a6ce6d006ee00e01530885a10015f9481
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, suggests a lure related to medical information ('Ecocardiograma dobutamina pdf'). The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=ecocardiograma+dobutamina+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fe3fbc0cf7fd.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/4090015.pdfIn PDF document text
    • http://epaytds.xyz/honda_pilot_owners_manual_2012jp60q.pdfIn PDF document text
    • https://kufibewiti.weebly.com/uploads/1/3/1/4/131406300/samoxebusexigu_doronuguf_teserov_perum.pdfIn PDF document text
    • http://igbusinessabouthelp.com/jorotfns1n.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/nike_air_force_1_white_mens_best_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405945/normal_6005d85aed345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387424/normal_5ff18fb40c2d9.pdfIn PDF document text
    • http://webdefilmizle.com/uncaught_referenceerror_telerik_reportviewer_is_not_definedgbmbk.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/efe3b04a4f4bb.pdfIn PDF document text
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/tulagariwu.pdfIn PDF document text
    • http://reduslimitaly-official.website/88117631640es1bs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5ffe4b29736c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/pofimuxiganapun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efe4a7a-5c0e-45dc-b506-d14595877dcf/78271722177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c085954-040b-47cd-a9fa-7856abaec09e/the_highwayman_cyberpunk_bug.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_51b3c0b924574ccd8631fb3e94ff9aed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cf93b7-556f-4c5e-9479-7f50c746b6bc/holy_quran_translation_in_english.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_48efc2b71bdd4244977a1776489ed08a.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_26d804bf85ac464389f41a8b61110b5d.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_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 5360 bytes
SHA-256: bc439d11b1d5d80107be7d69b59b874fcb7ef471973a396773c2e5e43e40a974
font_01_sfnt_off000113d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D7 11540 bytes
SHA-256: f6a4bcf03ffa2ebfaa02b3048726c3e453a42c3d8eb531f1f08a6f6c3f04e48e

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