Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a02ca797c39c2e…

MALICIOUS

PDF

87.6 KB Created: 2021-07-29 18:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b12f7d53d786d21acc170b6456a449df SHA-1: 58294f647bb3458b200ea85cb2e16018bff081b1 SHA-256: 95a02ca797c39c2e729f0d8a7f2aa5b4dfb225ea28627429addca8011134ad9c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farm characteristics strongly suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://philabc.ru/uplcv?utm_term=elena+undone+pelicula+completa+subtitulada PDF link annotation
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/me6j77fao50e58oa7hmki2ek06/3688715599.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/94152772135.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/03b92afa59db6e2482e9ab5abf504cd6/likawokizerezezofab.pdfIn PDF document text
    • http://riceart.ir/basefile/files/21329184500.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/71573938454.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/jojigiselelaloxekegekore.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8b8d579615317ce7b7f343b284418124/23260832068.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/37923708068.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18af7e113---kadumimiguruvagonokutu.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/5406010838.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092a4fa82b83---67579785170.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a470952a35---milakerokadaxazu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/82701b1bbe0493096394241cb3a34915/79812644848.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/wewibibi.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/28115839666.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210706234956.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5a67b5632f940d7c60ca72d225e9d07b/kubibukifuxuxamogewavuf.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/sinibo.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/1346dcfcba7bf5acc6267a7266f77593/tebekup.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/15f63d199e864405001400e8b8897eb0/budubizamajusupimupa.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/datajokemuxove.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_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 17892 bytes
SHA-256: acb8d1e674a86b4461af719a98de9907be15e815f27f1333f0d91b86a9d8beb7
font_01_sfnt_off00011ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DF 10796 bytes
SHA-256: f902ee1a403ac0efb2da52509ad6ee1c16f285c22422f452b0e64554d5696b66

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