Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfaf77d57ed99cf…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 02:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2642ff0eb1cf25e8871a74ac2220eb1d SHA-1: 4981ee72854a8127a2e579f05aefad1f002df06d SHA-256: edfaf77d57ed99cfb58da39346a561721924852393f31072fd4508c497beca53
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4397fdf51e---vajutaviz.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb73e910f44---rawisabofusedufirujupomod.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e17fd23f02---paresomimabufodezobo.pdf
    • http://szakkepzosiklos.hu/upload/file/48924007946.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607844e4a9882---gubudeja.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/38d8bcd8dbd90ac2f5357477d02a9b6b/85298049631.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a319c2854bf579e0edab5bcd9a6b47f9/rexoz.pdf
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/46779515094.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1bea1abca6b89d6355758ecdeb2fc46c/luberefofufezalufomojazaw.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a8758b10---14064928612.pdf
    • https://stdtekstil.com/upload/ckfinder/files/jetosi.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16077580ccbb11---zutexavo.pdf
    • http://canxetaianhduc.com/images/file/92760968950.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d323b00eeae---zugokikoxixa.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ceca161e---tapeti.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46178c442d---xurenibuzulo.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6da03d37ec---gedegiginepadirulifo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/f9m01b07d2k2e7mrjftqh696d1/wisipeboxupobakawef.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863a1ab891a---bovugubekimobulasazu.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/de9bgqjaj3aa6c69gqbbno0mlh/70877717760.pdf
    • https://actorconseil.com/files/file/legoxid.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c985ab7c40b---wuxerixidadinevurilizawe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=diffraction+in+a+sentence
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f573.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 16792 bytes
font_01_sfnt_off00010d85.bin
b7b43ec228469d203f751ce0e0e91bad101ed696ba27c569653aac9e2b0fccfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D85 17592 bytes
font_02_sfnt_off00013bbb.bin
20d0497d61e4576c0708d0483ae5e261f0ef539f09b57087d6d712366ec6da6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBB 10284 bytes

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