Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc05b4223289a974…

MALICIOUS

PDF

88.1 KB Created: 2021-07-30 22:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d64e7fe78ea273cbdfe8431187e54a34 SHA-1: 96a64ffa181a6b5033bb0e858ec230aed8efc443 SHA-256: fc05b4223289a9741d2444efd3f3a00f4f656d86bd461491ab9f8469bbd5f374
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating an attempt to distribute malicious content or phish users. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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://pataniforum.com/admin/jquery/ckfinder/userfiles/files/mukaduvokakewowud.pdf
    • http://driver-jazda.pl/upload/file/95087855569.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/037b99cc645de8240e91905bbdf50add/bukafegamujelepawadediw.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/1k34dmdnkfes3g6dck5aaio7ed/31781245827.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5e6a7ac49---jutavikoroxabosikel.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/8145599140.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/drpndhthf4374mujq6m41ah813/xeguxebodopolitigafatutu.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608617179946b---bumerinatumik.pdf
    • https://noithatkuongthinh.com/uploads/files/52373714199.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078c1be78858---57433813976.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954ec0b0463---zevelijekilil.pdf
    • https://nnkcreations.com/userfiles/file/13995133866.pdf
    • http://studioriboldi.eu/userfiles/files/xawirogutajek.pdf
    • http://goldenpoolandsauna.com/user_img/files/19321303000.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160787ffc27bc6---4883463709.pdf
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/ditototamevopozew.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/4f55bd318b393e9c8b8d81f79b19f12e/togegaga.pdf
    • http://sieuthibds.net/images/files/22428708279.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843ac7f25c---nipiwulewogipejakigumat.pdf
    • http://www.gonouvellezelande.com/files/zobuvafasabojejafusulifug.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/prhou9ch6kcsf627he51nngo48/fipuzoboluninipukav.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c61a63578a---sakirojovepaxelesemivone.pdf
    • https://aronabritcan.com/userfiles/file/wupud.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6585927787---seminipujusut.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/595883ba625cac352126492721e40be2/21497200865.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+game+ppsspp+naruto+ninja+impact+iso+highly+compressed
    • 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_off0000ef27.bin
714c61744c68035c57aa84d75cd74842fcd6279eef0c6e132b0b0d8b19d859ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 11392 bytes
font_01_sfnt_off000109a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x109A9 16792 bytes
font_02_sfnt_off000121bb.bin
039d497dbd13c7edbdf85237cf46de316391abe7cd2d5ed79d8da5873006c225
pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 17628 bytes