Malicious PDF — malware analysis report

Static analysis result for SHA-256 3360d00ba86512d1…

MALICIOUS

PDF

86.1 KB Created: 2021-07-04 22:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ef9dd52d5ac4c2858d65d1a355ed330 SHA-1: 369e44e7760294fafb9936e145ad07d46606b150 SHA-256: 3360d00ba86512d15c4d638d8173eed5b0e66626baaca36f78f040a491db71cf
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous external URIs pointing to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

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://nomylo.ru/uplcv?utm_term=horus+weighing+of+the+heart
    • https://xigmatek.com/upload/files/gofopizekixafodo.pdf
    • https://bandai-k.com/userfiles/file/62078283297.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c52e3e9571---disunajufaretesewifukurog.pdf
    • https://tselectromechanical.com/uploads/CKfiles/files/kewexejub.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607053df6aaee---pozufafakusetenidipusako.pdf
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/juguzepexadapobigabom.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e781fdbe66---megujuwafudimejo.pdf
    • http://zulaikhatextile.com/userfiles/files/34822789873.pdf
    • http://agataklimowska.pl/userfiles/file/83110610734.pdf
    • http://longvu.vn/Images_upload/files/xovepuv.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/0a026ec163437a399d88a10827b88b46/nixulevisokogamunomovemus.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/1m36hs1m4gg3teijq8v0avip3j/guvekatetavunesozijiz.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce3e79e70---govavikuzujigojebevaminen.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b09fbf132f0---dugikafiwore.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/76770796044.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/fe92c7d7730dbc0f7cbf7690eb145663/56899188143.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc180b6323---metodajimirejulixejizovan.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/c0738d02b9aa7e15895563dd91250a63/rinakifu.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e3f29e494---40561958334.pdf
    • https://n-zvuk.ru/upload/file/muturutedetewixepitogija.pdf
    • https://alakharia.com/public_html/userfiles/file/supabexadig.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/rn2g2utlcap63tji30d50hev2l/kojixegaluzefaletijef.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e73d2a1cebad59fb7cb78245609b4cc4/nilutavaloviz.pdf
    • http://rockhousemethod.com/ckfinder/userfiles/files/94308026179.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/nemubef.pdf
    • 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_off0000edb7.bin
9af487f2ad251da09d7a37911e499a637340989176dd18136b05fa92fa3fc4fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 10624 bytes
font_01_sfnt_off00010606.bin
7c3a4af08f1b7f11ac6ce7752b1d1a08f6203f39e9f4da3cecbb12464043dfbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 17172 bytes
font_02_sfnt_off000132df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132DF 16792 bytes