Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1331bdd17501623…

MALICIOUS

PDF

73.1 KB Created: 2021-02-13 04:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: abb05684dcb0bf5a1aedfc26693e3cdf SHA-1: a9db993885ec5cab9e32c34110608b80ccc6dd45 SHA-256: d1331bdd17501623db2d34320d09ac60711bd28a35413cd2a6bc78f3d9347c09
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 software. The document body, though heavily obfuscated, contains references to 'free pandora apk for android' and 'wkhtmltopdf', suggesting a social engineering attempt to trick users into downloading malicious applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=free+pandora+apk+for+android PDF link annotation
    • http://tehnomaster.net/automatic_mouse_and_keyboard_full_freeta372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_601786d50e44c.pdfIn PDF document text
    • http://jobugajaxelifob.iblogger.org/91649698091.pdfIn PDF document text
    • http://shishkin-seed.xyz/gaxoxasafuzaxomevovfecff.pdfIn PDF document text
    • http://cethq.xyz/97297893746nrvkp.pdfIn PDF document text
    • http://cactusvpn.live/clinical_biochemistry_practical_bookfigu7.pdfIn PDF document text
    • http://klokisik.space/pebezebitomezj4ilz.pdfIn PDF document text
    • http://pet-guru.shop/nosivobizelazewelofgin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lerariwafibot.epizy.com/bluetooth_drivers_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/god_s_armour_bearer.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/danegozibemutonanuveze.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/putitemudagaxofolexi.pdfIn PDF document text
    • http://bubejukajogimis.epizy.com/25219039577.pdfIn PDF document text
    • http://rusilip.rf.gd/work_dismissal_appeal_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/32839147094.pdfIn PDF document text
    • http://vijanemafe.rf.gd/guidecraft_dress_up_storage_center.pdfIn PDF document text
    • http://fotoburiwolof.rf.gd/merchant_leveling_guide_ragnarok_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/dubenefama.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD776 4844 bytes
SHA-256: 629f5fd2e8a81a8a0cc0b3d29da9156ddec83ed1d4eb661bcbd4a3dd7cf908f0
font_01_sfnt_off0000e800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE800 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_02_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 10932 bytes
SHA-256: 5cf28514f8844baf808ffd6d31b557c077fcf0c10c950dfa9f3d221c25c0909d

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