Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9721eafdda0f60…

MALICIOUS

PDF

94.3 KB Created: 2021-06-26 19:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 47b9647e11b48a12549369cbb46d8a54 SHA-1: bdb1870d782423408d513bad0f4068eda421583f SHA-256: ba9721eafdda0f60576d38a222c660e7d9f228a446a2ce5e8d5adf7ce800e799
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. No scripts were extracted from this sample.

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 https://huntic.ru/uplcv?utm_term=domestic+waste+and+industrial+waste PDF link annotation
    • http://www.pzkexie.com/up_files/file/firifomasefatiru.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/webis.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/48k10d4pbeg8ahpruj46aauled/85522613951.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4e095ed717d75281279654b92f9513c4/raxetizenalemoxazefenafax.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986fbe5b555---38884538115.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092184b137dd---3703928508.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eec788a975---17029770924.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/65ab8b1145a377b47cda3aae506d368f/51722711225.pdfIn PDF document text
    • http://altinay-law.com/images/file/nerugixegixus.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/fd0ea90abc06c1074907e9956adc7b91/66687456241.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9442361a1e---89612498055.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/da4f4e6d2c249abb6318f8c625f97bf7/95122450432.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/gevakupufizogif.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6117d13a96---64886048282.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/895e8a1ad1ee5471e0c0c9a5cf639863/20779166554.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25db80e19e---kuxadajepi.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/tidovibigexalanawinus.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/cb2ba79c56afae5223494f0e0c85ac69/36227648562.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/7929208b068514813b765f6a83b195e2/8162229641.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/kutiwimix.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/79785108336.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc265908c06---2786909160.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/i8g60sht6e7q4bkr12a5pjv701/33179351333.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a801ea9de---51158212729.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071918929e21---98739198671.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_off00010bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 17360 bytes
SHA-256: ba935b7d0f16d04417d9c27649a97ebb38c51b5ce2fedd69383896085b1da0ef
font_02_sfnt_off00015176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15176 10716 bytes
SHA-256: 460b76618d0546827cfdf98ca27692814f81f371f7179d386893a9b23d3e3308