Malicious PDF — malware analysis report

Static analysis result for SHA-256 f288174852b87196…

MALICIOUS

PDF

86.9 KB Created: 2021-06-26 05:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faadfa22fe0508166b62b6819256c56a SHA-1: 255ace1a42354d7c46bcaa87e941a1844eeab774 SHA-256: f288174852b87196f52b9b0f956cd50b848577d6bbd6ef714550fa4101741618
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites and disposable domains. These links likely lead to phishing pages or further malware distribution, exploiting the user's search for information via the 'utm_term' parameter.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=how+to+insert+column+to+the+right+in+excel
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160835940ad54c---tejuba.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/4d9b3abf4f263a27bb61b2196e5d3c25/jixevamuxiwutita.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e759377b6---32110133182.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/i8j1teqlv79dh6pt3q81kj0ej0/zosupu.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1db900ae50---movikiv.pdf
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/fokukufalufuzujoxofiregix.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/64e3d64ac3ef6d0f700444ecfa5e673a/tetodapipe.pdf
    • http://busanpc1.com/upload/fckeditor/file/37077223781.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6056e40e1---saxipikukupokofogima.pdf
    • http://imssp.by/data/images/fxeditor/file/7930644881.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/oh3sbkhvfq138pvh60i4pp3kbd/88402614566.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608229a4a8d8b---banokujaxazi.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098680e7ec29---51810779657.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/lowamodiku.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/lkmhnghcliqp34g77cfpdmk7a7/33581626338.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c163aaba01---59231090445.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/c76021cb533d4fdea3fb265c88fc7fab/610713866.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/5d2a6fc5505ea3d292d64f088672a1b1/23678300125.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/a41c52a9edd270828355b5341fa5e2fb/bizobemibo.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c35bd810d2f---39624861708.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/lm70g2tqhka6btj8ij89lc3i99/niligiwapenewe.pdf
    • https://afayl.com/userfiles/file/61086127025.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/a3bd7dcc5fc65aa42480a2b8c2983f53/73918147980.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/5c8j591dbp1trm7pbcsjkor5nb/fukenevatoruxet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efbf.bin
233d5b9793b06d60213d08b423cffbe1a46d3acb600a1a7a83be2f957334c72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 10796 bytes
font_01_sfnt_off00010878.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 16792 bytes
font_02_sfnt_off0001208a.bin
542cb4c9fadc06d631725aa851b929af9e2ffee85084fd3561276e6dfe12a326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1208A 17392 bytes

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