Malicious PDF — malware analysis report

Static analysis result for SHA-256 e303e2eb28858175…

MALICIOUS

PDF

84.9 KB Created: 2021-06-27 07:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55667e8ee9f878e136b1d87fe6b203c1 SHA-1: 6b9ad56e6e57f3d106e618c7019297bf2e7648d9 SHA-256: e303e2eb28858175ce77efb6c39f9381e0c47c28365b494dc43c855016089014
236 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and uses social engineering to lure the user into executing commands via the 'ClickFix' technique. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the document's structure and social engineering tactics point towards a downloader or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://sghscsjamarai.org/guruhargobind/userfiles/file/19498423261.pdf
    • http://onishi-kyosendo.jp/archive/98888778618.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/pr8rmer6r7o9h2dgjc9jkff2gh/sarapuv.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c527ce94153---fevanonorefirunaxaxara.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/df7b9e7cf24ced3aee6f8f8a301e3ae1/kidasizisazevuzaluxig.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/1qi7im8bfj2pqdnp3b2tdssje4/55526468706.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607057fa68dff---50718626889.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f3ed74a7873926c49a162ba9e2a5a2b3/45266997160.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/48eeae3ceef08635a581a8226f57afd1/17668171003.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/595c076204824f91e6b6c647d46fd61c/4614018541.pdf
    • http://cloverpark1959.com/clients/51168/File/fibepuwu.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/e2d980b11b409c7d303183737ce99742/gonutalafovojesapowi.pdf
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/37195095142.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6c0f46505c6688e2c1c1b190c9412515/sisolazobumugewivupas.pdf
    • http://xdata.pl/app/webroot/img/ckf/files/2403739262.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4fe800048aeb3bf29332ba35187f06b7/sotuderegazegezoxe.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087038ad5a83---kobizedokufatopukedu.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/390816a451b71afc6bb799b2392d15db/31305463991.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/61690426514.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c01d7b07---gojigozogamosaxurigudokur.pdf
    • http://119hero.kr/userData/board/file/rotufirit.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2bf08ef92d91c6e4eea58f44a53fe418/dekerivomulinurava.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/935015f08244a3f18e1024187e940b01/40436796323.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=monster+hunter+world+connection+issues+pc
    • 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_off0000e562.bin
80a91db123760bbad30040051ff217e9df3bef5b0a58dfae0c4f9f4462031346
pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 17692 bytes
font_01_sfnt_off0001143a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1143A 16792 bytes
font_02_sfnt_off00012c51.bin
e32a2ffe61cf23aec47009b589150174ce3d0ec0f0b1a6fc6c285a91974b6346
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C51 10628 bytes