Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bfeb12177e2c43…

MALICIOUS

PDF

77.4 KB Created: 2021-03-12 11:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fd3970eca4277949a2449f256d98d29 SHA-1: 40f3ab52c8cf18ca0727265f28bb33fb67f80552 SHA-256: 12bfeb12177e2c434d1d54fb5882d90655f3125bda66cb9f9a16845b879cfc39
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for a free PDF OCR tool, which is a common phishing pretext. The presence of this URL and the high confidence scores from security tools indicate a malicious intent to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://midufefew.ru/award?keyword=edit+pdf+ocr+free+online
    • https://static.s123-cdn-static.com/uploads/4379477/normal_600612822b5d8.pdf
    • http://tideparipawovu.mygamesonline.org/32305787848.pdf
    • https://cdn-cms.f-static.net/uploads/4452624/normal_5fd886c308f46.pdf
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5fe3b904f400c.pdf
    • https://fejuratomejavud.weebly.com/uploads/1/3/0/7/130776174/c357ce37d.pdf
    • http://rapoxarawiwalo.sportsontheweb.net/piragolomebomurawisi.pdf
    • https://cdn-cms.f-static.net/uploads/4381095/normal_6043ef3d3666d.pdf
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5fddaec8dd2a3.pdf
    • http://duperalenow.22web.org/one_direction_boyfriend_quiz_with_long_answers.pdf
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/fojuburewixiramomu.pdf
    • http://rakuropa.iblogger.org/backtrackit_apk_pro.pdf
    • http://sobanurosu.22web.org/7491397007.pdf
    • http://fisidijomufuto.22web.org/92423330181.pdf
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/3730715.pdf
    • http://palaxofivuleduj.medianewsonline.com/30648199823.pdf
    • http://wewogokuwidu.mywebcommunity.org/polabefuvazodasonuwoje.pdf
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/f219df087e3006.pdf
    • http://togurebuk.66ghz.com/7727699263.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tozapuzigopen.epizy.com/whirlpool_fridge_spare_parts_in_chennai.pdf
    • http://jefedajuwefafi.rf.gd/actividades_que_realiza_un_mecanico_industrial.pdf
    • http://lilufunom.epizy.com/64440134946.pdf
    • http://zebikijixikemas.rf.gd/how_to_prepare_a_wildflower_garden_for_winter.pdf
    • http://xemigososefof.atwebpages.com/coleman_hot_tub_error_message.pdf
    • http://dujikiwereka.epizy.com/android_mobile_game_development_app.pdf
    • https://uploads.strikinglycdn.com/files/0f8fcdbe-d16e-47bc-99cb-5c0f97c52e03/whirlpool_quiet_partner_iii_accusense_light_blinking.pdf
    • https://uploads.strikinglycdn.com/files/fe4d1c88-bc68-4ff1-9eb1-8a552c2a1ca5/fuduramobelemekumixeme.pdf
    • https://uploads.strikinglycdn.com/files/ba5a6f6a-6398-44ae-9206-2a1070c3ffe5/is_louis_in_queen_of_the_damned_movie.pdf
    • https://uploads.strikinglycdn.com/files/c6bd0bd8-4bc1-4c3c-b0a9-7d1fc19e34fa/how_to_shade_with_pencils_for_beginners.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_off0000f38e.bin
631dd99c61e3141a73adb79c1c30a928090a6361c61cb63e7b17903d4238dd22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 4720 bytes
font_01_sfnt_off000103b1.bin
3d67dce9cf205bf2227d929ead79c885a351ab2788d281e166c1f8f00969eb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B1 10416 bytes

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