Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf3911a94acab39…

MALICIOUS

PDF

86.7 KB Created: 2021-07-06 07:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cba21090ae8ae707c95181dab172b76 SHA-1: 1b5e6befeba7f1cf433160b4cd2ed893c3892967 SHA-256: adf3911a94acab3967fd31859a4f90f9e8c783e2b0587ed4e3912729d0f546af
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b82199c49f4---wegewakum.pdf
    • https://nepalimodelagency.com/userfiles/file/79668209171.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7fc36711---85397511818.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/69cc07f6be3b8e83ed49a9ffb1f11b5b/lokuran.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/25f957c05ec8402b33e4c1b13070c200/nenan.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/254e2df137cc67c792c131e6f3788ebf/sexajonivepiguwozililita.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6s79f4b16rbtgfnkk6iam0p4r8/jivezibudasolo.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb7b5899df---rukewo.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8e9649a364e326966007054502c74601/berozilu.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qgsdp07irbfbtetnkfkvodurpq/48061546495.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096a39752020---budopej.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160905dd3e172b---xokafupapoxofon.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/704ac17092aeb1ca85b82260561a06fa/xesotumawefikujiz.pdf
    • http://dyglas.com/userData/board/file/58207046702.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f23cce9b7f98f214e926c9272ad7b79/12027030931.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/00357d9933f7d807c3e897ceadcd225c/razifebusoxesuravegukebi.pdf
    • http://barnesfamilyre-union.com/clients/52050/File/bagepizoxiwo.pdf
    • http://thevisionkharj.com/userfiles/files/nusedefasuzalaso.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a84cbcd25---6792933037.pdf
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/kobakidamozubune.pdf
    • http://lycee-elm.org/userfiles/file/kigepegafibuxegatiwila.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff8174f30---sovutibola.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31d2b1303---14172058589.pdf
    • http://rudolphi.nu/userfiles/file/degiruzef.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094606a94903---34981006168.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=oh+my+kadavule+torrent+magnet
    • 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_off0000f151.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 16792 bytes
font_01_sfnt_off00010963.bin
60995da79468c3e4d5b0c834a916d87c0262585097dccbc145601e08359b2632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10963 16756 bytes
font_02_sfnt_off000134e3.bin
4a0a0fa92fd927339ebf39d6eb5300716b63406a4781c3a6310d512e0ebedd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134E3 10832 bytes

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