Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68a2a7121113d80…

MALICIOUS

PDF

162.0 KB Created: 2021-08-12 20:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 21197428a8618296fb4504b42587427b SHA-1: 68c2f83779f6428e50e46cde91c9c3e29c422f5f SHA-256: f68a2a7121113d8086e52798878c2f8c69dc06367ecee8d1d057085ec3a38c7f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are WordPress installations using the Formcraft plugin for file uploads. This suggests the PDF is designed to lure users to these sites, likely to download further malicious content or exploit vulnerabilities. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://boschvietnam.vn/files/usersfiles/files/nofumis.pdf In PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f58a33d20a---51343287901.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5a14eb57c---64158514045.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/51548497635.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1f2928fab---13390833529.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fa2baa96f4af878b40407f1ae154cc60/jagosexamerodejet.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/pojowaxa.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/e8id9nodfuida38on5jpnt4u0i/fofodu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160d56fef2aa1a---67977123226.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/50177374078.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/6726980956.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/31888185861.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e83cc41672c---voluserawuguzopuzoxufewa.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/7287558086.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a846703c33a---jevodud.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/vajomaluxed.pdfIn PDF document text
    • https://t2sc.me/userfiles/rinononemugegawaderod.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/jcv8q7nfqda6nt8up0m7bib0bt/47681830884.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/77243536626.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/94365967863.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09f05dbdfd---84591022873.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea6e01aced---vixadejojazupuwevofowite.pdfIn PDF document text
    • https://eubeer.vn/uploads/files/jokulavefigejexitabali.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/bcvt747oa1hf0d9cqq7umoiqn1/zogogisudopunoposijomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=lab+interdependence+of+organisms+assignment+lab+report+brainlyPDF 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_off0002182a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2182A 17688 bytes
SHA-256: 8002e4b0cdd53e23d087fba04400484ca4878ee201ba29a06248323ed9ee247c
font_01_sfnt_off000246bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00025ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25ED2 11176 bytes
SHA-256: d925358ed471db7a58232dfbffaa396461e82b0ad911d91149c924b810fa44b5

Open this report in the interactive analyzer, or submit your own file for analysis.