Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda69152c502de3c…

MALICIOUS

PDF

82.0 KB Created: 2021-08-12 20:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 4eaecb6e1d35451584164ec676f518f4 SHA-1: eaa02b0e3b6d4d15aa76619ba05a51bdb69d6ea5 SHA-256: bda69152c502de3c327c58f82ab7f75ae6a8b372d8dd84c1ed5614cb315d7115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The numerous embedded URLs point to compromised websites, suggesting an attempt to redirect users to malicious content. The file's structure and URL patterns are consistent with a link farm designed to host or distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=northouse+2010+leadership+theory+and+practice+pdf PDF link annotation
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/8542848370.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/32e9cf64b5dc99696677c3112c49e195/34532566235.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f0318ea0---27986580736.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/kixajapelixalo.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/76985391658.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210723082601.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/26787966ea1bb260b05f2a4219c56ab3/dotujegabef.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070854bd186c---95752108035.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/gorasijipowabalupo.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d950e3c337---mowelavuxesipedurizur.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e471586926---xenujisegojasixaganami.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e570150805711fc859052325299272a3/sowonagogami.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/nhtiqoj6s2dt32o3abjjv18o37/guwodinixokawifoxos.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05daadb183---bepiregelerowajezajopa.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/89023588230.pdfIn PDF document text
    • http://tochalco.com/uploads/files/50299874046.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/fitelijixuximamer.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/dalekaladerudani.pdfIn PDF document text
    • http://mosjob.ru/images/file/dewetafoleromimoku.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160941d855f87e---lelaruxava.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/merejet.pdfIn PDF document text
    • https://iltuosarto.com/file/15689400645.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bfcafb6f---539584920.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/nikiwomadivulojiku.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a31a70634c0---71757622648.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 11204 bytes
SHA-256: 0ae791a287e8656c5d5d281b866ed7dfc23da1a0b7c72bcf6787cb1303c50be8
font_02_sfnt_off00011059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11059 16148 bytes
SHA-256: 4c028907a18179edb97ba7bf853b92f5035a2513f2f48903067cc72233b5f32f