Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e5d8a80d7a2594…

MALICIOUS

PDF

77.4 KB Created: 2021-03-01 00:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e1764f924d6f2adc269c93af44088231 SHA-1: de18f8a01002a82dceefd988581f7856523cfdf1 SHA-256: c6e5d8a80d7a259403a33a7e2ee4cb26356edd4a2cae93ceb1e220756cf366ce
134 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 numerous embedded URLs pointing to disposable hosting, suggesting an attempt to distribute malware or phish for information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a deceptive link farm, likely to obscure the true malicious intent behind seemingly benign content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=youth+basketball+drills+practice+plans PDF link annotation
    • http://kadipesiwixovil.22web.org/gatuvagume.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/can_you_put_tramontina_in_the_oven.pdfIn PDF document text
    • http://feelslike35.com/two_wheeler_driving_classes_near_me_for_ladiesrrz8g.pdfIn PDF document text
    • https://cdn.sqhk.co/vavapezami/dGwqCFr/talking_cat_tina.pdfIn PDF document text
    • https://cdn.sqhk.co/rovonoset/haDSYHK/last_day_of_spring_2020_ucf.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/vutumapisaferibarureda.pdfIn PDF document text
    • http://sport-stavki.fun/gloriana_conversin_de_hilos_a_dmcckvdq.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/agifjbL/banodorowakedujer.pdfIn PDF document text
    • http://feseburowikuted.22web.org/criminal_civil_constitutional_and_administrative_law_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/oThjCib/93404290868.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/29206303584.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/ggDijjj/cut_em_all_blade_masters.pdfIn PDF document text
    • http://sijibufaw.iblogger.org/porter_cable_ts056_not_firing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/sogibanal.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/antagonistas_adrenergicos.pdfIn PDF document text
    • http://sezajuvijib.rf.gd/bomajavizapa.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/piwamozupokijen.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/2601861583.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/pukozefosuluvuzomabe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 5328 bytes
SHA-256: 30920134625448741a86c1323612cc635541964ce57667157751b1ded5af11e8
font_01_sfnt_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 10512 bytes
SHA-256: e8879d21528c35721136a823153d167fb76338267a1c52e17c134ccaa0ee67d9

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