Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0f58950269efee…

MALICIOUS

PDF

91.0 KB Created: 2021-06-28 04:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7e44e5df0d1354bac48e7ed38875d9af SHA-1: 09f9aee7857a81e57a39c0da2bebed2d3b5d6689 SHA-256: da0f58950269efee8698c1367efdd0ab85134a99c3fb6fbdaac27b6427e2d0e0
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • 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.
  • 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://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/knek6r5ri1uhdtdafdq9f3b5rb/dovitifamedunetinuturifo.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf92123b5---31015993716.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb671395efe---sujodimilapurirugome.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/0bcf5861c11f2006dd410be3af29486b/palibiwega.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078299827d30---47683852639.pdf
    • https://bya-ingenieria.com/ckfinder/userfiles/files/zaxafeziji.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/14007118162.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12c0184f57---riwudanapawopixogaru.pdf
    • https://akapacha.com/userfiles/file/netuka.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/892b8ebd4b4f04e53e694de286314f5a/botomewuwemetigumitoduxug.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/353m580tnk9dqd79v36q077o16/81120235381.pdf
    • https://natyabio.com/uploadfiles/bagopevamidame.pdf
    • http://mid-europe-ex.com/images/blog//file/ledopigagivusotaja.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16086471089fe1---buvomasatubinag.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1dff9a0bd---64855548967.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6510221b8008e78ae32ccaf7da127c9d/sovobutepodevox.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ffe8631ed---69694201988.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/175c3ed2ac2222ce324dfa5e37443179/jilisam.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/20baae83bf8881bb06b15520cabd7f0f/27641429714.pdf
    • https://fceresources.com/ckfinder/userfiles/files/566213408.pdf
    • https://superchills.com/userfiles/file/38101940077.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f9fdb97649bf675c0b419c992dd4fc28/kiminokuxunexu.pdf
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/54095340137.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=very+dirty+sexts
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d3533b774c04b6fd7ed69cdb34c43052/raweberazudo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebad.bin
0ab4ba683ee02072dce244787a5a4f437ba85f812e99b0baab6e00a4287ece03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 9992 bytes
font_01_sfnt_off000101f5.bin
f3ee29ce12490ff0221c91f56165bacf2550a4595c7dfbc3b2e4cafbfe78416a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 17660 bytes
font_02_sfnt_off0001306c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1306C 16792 bytes
font_03_sfnt_off0001487d.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1487D 16312 bytes

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