Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7db1407f2ed82b8…

MALICIOUS

PDF

72.0 KB Created: 2021-04-15 15:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08b30d307a805b1559ad415bec7f3443 SHA-1: 2eedeb88c1d3d214bfcc54493ab48dc6afeab3f2 SHA-256: a7db1407f2ed82b85ce648e8483da145067ab9802526e1e0239c5641f1d33352
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 'botokaw.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=how+much+oil+in+deep+fryer
    • http://itawegan.fun/24311865119j2nas.pdf
    • http://want-seo.ru/59443885736xn0u4.pdf
    • http://0fruits.space/pirate_ship_playhouse_plans45kas.pdf
    • http://movawizaxaxato.mywebcommunity.org/46530320705.pdf
    • http://kevakigev.medianewsonline.com/85747855798.pdf
    • http://nopuvobetag.mygamesonline.org/breadboard_projects_for_beginners.pdf
    • http://lestyprin.online/dewoselamikepomuvotegiej8mt.pdf
    • http://topafigo.mypressonline.com/gelusuvep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xajumin.epizy.com/epic_seven_guild_missions_guide.pdf
    • http://kazupisejurig.rf.gd/12657111904.pdf
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_a76e5be763a4460eb460f2928f8ad846.pdf?index=true
    • https://s3.amazonaws.com/zuwosil/6747277438.pdf
    • https://uploads.strikinglycdn.com/files/236f9014-662a-476e-bc9b-650310dce3c1/mossberg_500_ag_pump_shotgun_combo.pdf
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_8f07e1080b3e4110a8b19d4347f6ab0d.pdf?index=true
    • http://nurirola.rf.gd/ap_human_geography_terms_and_definition_of_imperialism.pdf
    • https://s3.amazonaws.com/xomudufe/45578938732.pdf
    • https://uploads.strikinglycdn.com/files/e8427d17-d0d2-49ba-8650-3fe00e10b65b/marupaj.pdf
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_d59511764e9d47bf890ecbacdc456e4b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f252307f-92cf-418d-a33a-eccc754dfd57/24367829734.pdf
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_f6c992ecb6634947b61d41fa64f57350.pdf?index=true
    • http://rofarodet.rf.gd/arthashastra_malayalam.pdf
    • https://9480ebe7-8096-4165-94d5-b35dd525e9f4.filesusr.com/ugd/07b43d_83bf4990f068407bb9a4280253366f4d.pdf?index=true
    • https://s3.amazonaws.com/xijilesuzuxo/add_subtract_fractions_same_denominator_worksheet.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_off0000de51.bin
4a11bdc9d99c05940a3ae881f415c1482ab90f404301a3d85e2954841fd5d8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5164 bytes
font_01_sfnt_off0000efcf.bin
607c88e0ca2c4e972fc3aa363d69a5a3be8425a4f4a064deefad156ba8550b05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 10124 bytes

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