Malicious PDF — malware analysis report

Static analysis result for SHA-256 d350fb87216b2647…

MALICIOUS

PDF

198.4 KB Created: 2021-03-24 04:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b20a32ded743e1889ca9ea67fa85ef SHA-1: 30d6ae7af8665cbee14ff0a23d5a7824c2377495 SHA-256: d350fb87216b264770278c1041c22d6f3f04031eb6dc16f9b22144cb97f2d4c1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'Jenkins .net build' and 'wkhtmltopdf', suggesting a lure related to software development or build processes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://pelibifir.ru/strik?utm_term=jenkins+.net+build
    • https://cdn.sqhk.co/dalubevemex/gebBRF8/engagement_invitation_card_template_online_free.pdf
    • https://pexarokozisakim.weebly.com/uploads/1/3/5/3/135313666/muworefazakeg.pdf
    • https://pifonexivusefeg.weebly.com/uploads/1/3/1/0/131070190/270801.pdf
    • https://cdn.sqhk.co/fasaparoba/igCghii/espn_960_ben_criddle.pdf
    • https://cdn.sqhk.co/wunokebewoz/VHaaCIX/wbtw_tv_13_florence_south_carolina.pdf
    • https://cdn.sqhk.co/fapewakuw/fe2jghc/letterboxd_pro_cost.pdf
    • https://cdn.sqhk.co/guwaloxipete/hgxgfif/duvijeboxetulixumenonar.pdf
    • https://cdn.sqhk.co/xulawajikigi/hfWmmCW/lucky_block_addon_for_minecraft_pe.pdf
    • http://������Jekins������/restart
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/samopakamefap/bane_mask_template.pdf
    • https://uploads.strikinglycdn.com/files/bcad4357-f148-4400-9fb0-e8845811115c/bomuxitawexowolukewigonix.pdf
    • https://s3.amazonaws.com/mizeteb/how_to_connect_my_lg_soundbar_to_my_vizio_tv.pdf
    • http://nelivivox.rf.gd/vampire_diaries_season_8_episode_10.pdf
    • http://buguteloseserup.epizy.com/tekutuvofugof.pdf
    • http://tifilumiteva.epizy.com/90066703218.pdf
    • https://uploads.strikinglycdn.com/files/deb20528-b5db-4949-9875-d5466f3f11c7/mikorofuvakepovidamiga.pdf
    • https://uploads.strikinglycdn.com/files/06f46525-4a6b-49fd-b74a-49b00f2025d9/51345944193.pdf
    • https://s3.amazonaws.com/zamuriza/wiwiwujofuf.pdf
    • https://s3.amazonaws.com/lowuwofuxali/69309072534.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_off000104da.bin
83512c587ae4a1fe21cfb6a84eb3f71462ccee3bc54a8626e49edebc98ceefa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DA 150052 bytes
font_01_sfnt_off0002bfac.bin
e2a93115859e58d9f05941a607cd6092149bcb628a6b1e75cb908545399eb465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFAC 4740 bytes
font_02_sfnt_off0002cfe2.bin
b427ecec4e3daed75e84311c2e8793bce27610abc92967b2bd5becf459f202c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFE2 11252 bytes
font_03_sfnt_off0002f691.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F691 16204 bytes

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