Malicious PDF — malware analysis report

Static analysis result for SHA-256 196f7115b430f687…

MALICIOUS

PDF

79.2 KB Created: 2021-09-04 23:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5f9ca8b5ad369387c1e0b3db92b9a8d6 SHA-1: 0a1037f93ad885ab6d4b5f1edf97bcc379596eb1 SHA-256: 196f7115b430f687dab690d7ea9c28b30539d04560330768b2b7853aaa45acb0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be68b8585f---36106798435.pdf In PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/91120db1b92a762e5feb7f321f8478ab/wuwokata.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/jifopididixafi.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/17968716097.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bfc4d78f2---mijawamirejimodegimop.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/3b3319ec43b2db054594dc02a637fe8b/26546099379.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/31969911766.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/696b8bdedfb74730e0dee6ecb5b1b87a/29314922040.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/seserorudurevem.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/l1v52p9r2dr9aaavbuhfpp4hlv/migajafuzulopodenag.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/17575786591.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611a91439d62b---63997207469.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/87045799110.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/zivuvu.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/bumini.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/zanuzekexufava.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/gituxovokasopotor.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ef4e08b256d1a4647ec0c6804a163e23/jirokugusipekunemev.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/63443bea242738c1526c64c258d3de62/bujononipokix.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/0d4d7125133dc5acb43dfcd15b13f08a/3533580537.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b1571357---kaguzajubewa.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/webid.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/kikixetake.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/fowamigilola.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/84320557660.pdfIn PDF document text
    • http://focostrade.com/files/20210704122950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=classroom+teaching+skills+kenneth+moore+pdfPDF link annotation
    • 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_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 17032 bytes
SHA-256: e5bb6d83186d0fac5aeb6693f514ce5427f4569fd53093b38e504e5b2ad05def
font_02_sfnt_off00011511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11511 11192 bytes
SHA-256: 728b78ec497664afbd764245906314b3ca7a0dff98fb18895fe81b0402025bcf