Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd120fa9b465524e…

MALICIOUS

PDF

102.8 KB Created: 2021-07-16 08:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae34acd36dbb56c5d60bf4eb76937921 SHA-1: 9b105295f903c4e1a2538658beae1a09ace00506 SHA-256: bd120fa9b465524eb8b649fb569c4d029c016fa48f141f695e624137de04c556
196 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including ML classification and specific indicators of advance-fee scam lures. It contains numerous embedded URLs pointing to compromised websites, many of which are hosted on disposable domains or use WordPress plugins for file uploads, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://oniceh.ru/uplcv?utm_term=goldwater+and+miller
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/549aaf87e62883dd17d62736147bf1b2/sapuwumoranor.pdf
    • http://planetamama.ru/files/file/94859917843.pdf
    • http://www.mostex.sk/files/articles/file/supifilipoto.pdf
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/3993948382.pdf
    • http://birminghamseaholmclass63.com/clients/75362/File/11234922640.pdf
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/wovigir.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160959b0026c93---50875309231.pdf
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/97408957300.pdf
    • http://hkacca.com/userfiles/74018978691.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608885426a285---40613275088.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b9a12f77a---6782550665.pdf
    • https://aulacvn.com/upload/fck/file/gikisusevubu.pdf
    • http://churchtextile.com/userfiles/file/wuxagi.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/10108979193.pdf
    • https://radio-aurea.eu/files/file/botidemininofinasini.pdf
    • http://interiorconsignments.com/media/file/wotigetirased.pdf
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/68981723864.pdf
    • https://cafepiolho.com/uploads/assets/kipubezifirefuzinul.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/7873a3365d5bc1d96b58a21c44778642/mapejifad.pdf
    • http://aaaexpressheating.com/userfiles/file/78694850366.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/ec19ceba765175094249112e033c821c/58183774093.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9216e189c8---21144989262.pdf
    • https://getadoc.in/ckfinder/userfiles/files/xiviwigagaxozilalaxibasa.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9166a17d2eaa035bfa7a369db2294841/vurivodase.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_off00013085.bin
285a56377a8fd52c55245ff94dce8d3e71924df4466cc2d0e0aa20c30c9f83ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x13085 17656 bytes
font_01_sfnt_off00015e67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E67 16792 bytes
font_02_sfnt_off0001767e.bin
e42ff9ff433b937a8518656b235f6c86826ba38ffc6ed9195fda250d8e6b534b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1767E 10368 bytes