Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0e38ac472cb246…

MALICIOUS

PDF

84.8 KB Created: 2021-07-07 18:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 701c6a3573e0284a199131bcb49484de SHA-1: 76589947d0217a3732d08ae7a9e5e03725488fb3 SHA-256: 2c0e38ac472cb246460d83ee7b4a74b5369d6d5e06d1392430d57ff4a55d2fa8
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam. It functions as a link farm, directing users to various PDF files hosted on compromised websites, likely to facilitate further malicious activity or phishing attempts. The presence of multiple URLs pointing to potentially malicious PDFs indicates a coordinated effort to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa01458c9ad---zumes.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4597164fe---visudeva.pdf
    • http://bike-aholic.com/UserFiles/file/fojotolexofobow.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/776d4bfce0320e9cc477d90da17f0b67/72426473921.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/45b7379376304bc2e946aeffbc8f166d/21594256441.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae23a2bf73297cfe99a6788d5c91d3be/821559702.pdf
    • https://unosms.us/userfiles/file/sutesititiralileveduli.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/23fef466855cbb10c1a6040e1c9204a1/81168037564.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/fc277e0c19c6d565708071f2ab260fa7/nadenijoruwake.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b33bea18---56475894519.pdf
    • http://sarljarry.fr/userfiles/file/61886021947.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160724ff1ca4b1---togokijusidutewotusud.pdf
    • http://sobsai.com/ckfinder/userfiles/files/zenox.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/9dabe9b586c297d7efb2a6873924173c/kexazojowunujujuke.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/08b9182fd13365bee988acfb3c61990d/76996268758.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839726de6f6---83728836457.pdf
    • http://movitecnic.fr/ressource/site-image/files/bukudajosat.pdf
    • http://exosportsante.fr/ckfinder/userfiles/files/lazimonubagutatokob.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/46886470859.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/2f2637c7265b624c08321a6d4ab4fca5/zegevaxavosota.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b58b7892aa0---daribavusovipoziniwut.pdf
    • http://constantemails.com/userfiles/file/1624067616tibatew.pdf
    • http://jandenzobv.com/image_uploads/file/87786603291.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/fj9n8vcfcpm7lnu413pnb4vidm/881281912.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=fortnite+for+android+phone
    • 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_off0000e901.bin
879ebc08a34aa3d1cf3b5d3ce4b2fa65c8768bd57d75dd7ecd7a6968310aaa14
pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 10360 bytes
font_01_sfnt_off0001003f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 16792 bytes
font_02_sfnt_off00011851.bin
af1626abbc9b457e5451395f22f695de76330800ee72f4793f5a7a217a040974
pdf-font-stream PDF embedded font (sfnt) at offset 0x11851 17476 bytes