Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8f064538a058ad…

MALICIOUS

PDF

69.2 KB Created: 2021-09-24 14:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f5feb85ebe3f27e9d14c90af35020417 SHA-1: dfc19610a98ed9460e0a59c69bccc6126f7a2313 SHA-256: 0b8f064538a058adaa2a26f705f82a1ca53fa7199450b3ae79bbac1918916440
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs a common screenshot lure technique, presenting an image that hides a clickable link. This PDF contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://inwebjor.ru/uplcv?utm_term=amazing+spider+man+123movies PDF link annotation
    • http://vectorma.ru/uploads/assets/file/zuvagararukekidit.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5i2akau9ika4rpp07qbn2s1ven/dawaze.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/dalavujiji.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4e147aa18---70823882932.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109240913458060.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/furemo.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/nizedowafetisod.pdfIn PDF document text
    • http://xn--80adib9cjd8a5e.xn--p1ai/i/upload/files/86056132468.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210915160813_1039327561.pdfIn PDF document text
    • http://musorcentrum.around.hu/files/article/file/lukepasaxapamoxisosugo.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/19719070983.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/mubapurok.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/nebaxivule.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/43191307307.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/vixumujegogadi.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/69165260961.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/62630379207.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614789ac40750---94087371173.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/62821770176.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/jemuzuvokunu.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///rukelo.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/81946357465.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/87058809528.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143055b328fd---80625377121.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_off0000b097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB097 14080 bytes
SHA-256: 1a74b1745a0f90cc7a6840825fbbebfd329fd8dce6912aabace8c05cb7cd1e5d
font_01_sfnt_off0000d387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 11040 bytes
SHA-256: a1ac8dc30d2fd7d7ad058ad1f4438fd04b93cf643206bcf7d7a896afd7cf47ba
font_02_sfnt_off0000ed27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1