Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06993657b449b99…

MALICIOUS

PDF

151.4 KB Created: 2021-02-17 06:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 927ac379eb9127c0582fd07d3a5ecf03 SHA-1: 59843d06da2001cbba6a458fd70f7fb80c338cd8 SHA-256: a06993657b449b9986c0ac914d357b30ffc1d45fae27a2400f6c71039eb7789f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/123?utm_term=blue+irises+komahina'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=blue+irises+komahina In PDF document text
    • http://allostar.buzz/tepubusisilulibumodusukaaq66b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409246/normal_5fe26d1a0bc2b.pdfIn PDF document text
    • http://ludshop.xyz/sanyo_pro_xtrax_multiverse_projector_plc-xu73_manualfnoxk.pdfIn PDF document text
    • http://nowofuguvinidaw.iblogger.org/af_4005.pdfIn PDF document text
    • http://freud.icu/degekuwojalakejixi6droz.pdfIn PDF document text
    • http://rerolakareruxom.22web.org/66410497990.pdfIn PDF document text
    • http://copyrighytsupport.com/lire_et_interprter_un_graphique_cm1_exercicesy6fx4.pdfIn PDF document text
    • http://anrostore.ru/18722455206rahhy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/osrs_demon_slayer_quest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/blue_floral_ruffle_tea_dress_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/66534056380.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/learners_permit_study_guide_utah.pdfIn PDF document text
    • http://pixagikaw.epizy.com/jinam.pdfIn PDF document text
    • http://mowesedapi.epizy.com/multiplying_binomials_by_trinomials_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/bonus_ball_number_sheet.pdfIn PDF document text
    • http://nabapuxamiluj.epizy.com/12467613185.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_off00020cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CD3 5036 bytes
SHA-256: 7ee3581cd64f9627f476ac02f05b4000f2cdb37a7c84515760d6e0154199888c
font_01_sfnt_off00021dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DBB 2504 bytes
SHA-256: 0ee854a24b89f7ee8570bbc505c50a6667f3068117e125e0485dee6a0a160261
font_02_sfnt_off000228a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228A2 11940 bytes
SHA-256: 1a0b04ceccadea89e0ebeba9c80e6a00b9a2e1ff67535bea49bad0620a91b631

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