Malicious PDF — malware analysis report

Static analysis result for SHA-256 9488a12af7f1af3f…

MALICIOUS

PDF

76.2 KB Created: 2021-06-30 19:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 65da67182bc8db80f7ff3a9c0f08604b SHA-1: a686dc5c2c1dc51c0cf4ba191f49e06a2a182c97 SHA-256: 9488a12af7f1af3f4d2abc6ce90c61b17293748ccfd34306ca0f69b081ddd5f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The heuristic firings, including ClamAV detection and ML classification, strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=free+full+action+movies PDF link annotation
    • http://jkmdc.com/aversystem.com/userfiles/file/pejamamiguvamamodifugamal.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ccac38776bc---ziguxatepoxaraneku.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/kinin.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210501191917363672itxmd9.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6fecc16d---92348739716.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/m439tbnc2r90ciboi2nsmqsn2r/dulatatitesama.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/jb8a9v75kcbnfvp8sjgmrkg2nq/kenerufodepumeje.pdfIn PDF document text
    • http://greenbrier101.com/userimages/5997601455.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/390ba6150be8d4d8800a51607c3747f7/tajiboxigagekibabe.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/piwusixuxipilisoxogoso.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/316821405.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/wexusikufapevu.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/1fcfbd2b4e9bbe352d5b57d9d3021dfe/rivatedidefeduk.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fee45fd2e5eecb94a5e4955a1c4d86f0/88913587463.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996b0aa1516---59580055533.pdfIn PDF document text
    • http://healthywithhart.com/res/file/donarewuxobeke.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/jelegupiful.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/mazibuxizex.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/tunoxutaketirelofu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f49a002e8---levodavekaxiwugizisavuke.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4481ae6033---vuvepoginobogesilevutovag.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/94327106764.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/67166186580.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/qo9541d30pfq5laf2ve8no6qlr/40535691325.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5b0560db73215d92a1844ec7f9386192/59679535324.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/81437764267.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C7 10640 bytes
SHA-256: d378c3461736f49ff6d154ff89652df4b441d7ffe2eb9ce7e52e6c021303509d
font_01_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 16332 bytes
SHA-256: 2707a10d75acaf4ec76e00a362288a9da00f64bb6b8179933ff7ab5f12f32f4a