Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1542ece5d504bba…

MALICIOUS

PDF

84.9 KB Created: 2021-03-25 14:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06f04aa20f7f84fbf44c573eb164a7e0 SHA-1: 953486b198a4a1647d6edfd1b04dc8e9b8432335 SHA-256: f1542ece5d504bbad8a395c9e7451020a9227a4a28db9ee616f45dea54763604
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 URI pointing to a URL that appears to be a lure for downloading the PDF, likely containing further malicious content or redirecting to a phishing site. No scripts were extracted, but the presence of external URIs and the nature of the detection suggest a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=the+magician+king+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4385648/normal_605b74836cc26.pdf
    • http://kajejib.medianewsonline.com/berizoxig.pdf
    • http://gagitevanonuti.mywebcommunity.org/believer_s_bible_commentary.pdf
    • http://zazorin.scienceontheweb.net/how_to_use_new_hermes_engravograph.pdf
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fdf8c94b80cd.pdf
    • https://static.s123-cdn-static.com/uploads/4372085/normal_6007987212d6c.pdf
    • https://cdn-cms.f-static.net/uploads/4450430/normal_60595a2266415.pdf
    • https://cdn-cms.f-static.net/uploads/4366623/normal_6017dcef9c559.pdf
    • http://gigezesuzobe.getenjoyment.net/business_english_in_use_intermediate.pdf
    • https://cdn-cms.f-static.net/uploads/4490929/normal_604dcab0d8ad9.pdf
    • https://cdn-cms.f-static.net/uploads/4486200/normal_602369864c5b1.pdf
    • http://gimatadokij.mygamesonline.org/4832050926.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xaliwalufoguni/7466458082.pdf
    • https://s3.amazonaws.com/kodipopujufipig/presentation_templates_history.pdf
    • https://s3.amazonaws.com/zemunomipazikez/84991613037.pdf
    • https://s3.amazonaws.com/dakebesuvum/phenylephrine_mechanism_of_action.pdf
    • https://s3.amazonaws.com/sitok/reported_speech_conversation_examples_with_answers.pdf
    • https://s3.amazonaws.com/rezugekolaba/tipemuf.pdf
    • https://s3.amazonaws.com/mipeboro/jobepexitibogub.pdf
    • https://s3.amazonaws.com/magapeguwabe/zixiwizalujakez.pdf
    • https://s3.amazonaws.com/fonibinaraj/movies_app_apk_free.pdf
    • https://s3.amazonaws.com/fusopoxipo/bt_home_hub_4_guide.pdf
    • https://s3.amazonaws.com/sukedil/97561500325.pdf
    • https://s3.amazonaws.com/bubeto/sony_xplod_600_watt_amp_review.pdf
    • https://s3.amazonaws.com/viromibukoleliw/likes_and_dislikes_worksheet_ks1.pdf
    • https://s3.amazonaws.com/fevobelijogal/manualidades_para_vender_esta_navidad.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_off00010dd5.bin
cf871b5d008e2462b0432e896ec72ce2594eeee353e9cba26e4b4aa7605b0a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD5 5496 bytes
font_01_sfnt_off00012070.bin
9eb805b2bf114891723cb714cb65f8924b7444ce01905f6e5ae13b7c2bb8191a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 11028 bytes

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