Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8e1c07049c1a1d…

MALICIOUS

PDF

102.6 KB Created: 2021-07-18 06:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 41928020ccbb0fa2ab5be4858f850f85 SHA-1: 37bbda166964a1ee7daa751fcc238a0e3ac85fff SHA-256: bd8e1c07049c1a1d07708b5992ad666262ff26e2227997e396e3315dce805f15
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566 Phishing

This PDF file was flagged by multiple heuristics as malicious, including a brand impersonation for credential phishing, specifically targeting Facebook. The ML classifier also strongly indicated maliciousness. The document contains numerous links to potentially compromised websites and disposable hosting, suggesting it is part of a link farm designed to redirect users to phishing sites. No scripts were extracted, but the overall structure and heuristic firings point to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=complement+object+direct+and+indirect+french+exercises.
  • 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://prunay-en-yvelines.fr/ckfinder/userfiles/files/jokitukaviw.pdf In PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c84ce269786---79909723224.pdfIn PDF document text
    • http://kotolantopeni.cz/file/3196764143.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/66746397294.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b0959d71a---39800611302.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/a85c07e685f73a2d016ed30b930e6687/38654561587.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098993db7e6c---tugalibopagas.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ed394faa5b2b94b8d7a32fcd39f646c2/mokafevikowudojuruw.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/62857219135.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/17051610458.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160763a7adfcda---kutavububujavufewopaf.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210714_25903BF6D3ED8F4E.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/717d0c5dd683572ab1b4368c29139181/31597017871.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/13964609737.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab126ca2e0e---52654120415.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/kujime.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740d80cb6be---80267134448.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082f2f15e7d9---96398232815.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3091c6254---juzeguvejivimiwani.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/69443709140.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd39b04624---97712610593.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/34933154914.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/488666.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c2c01f531---95634115583.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dea99ab08---taparozekewip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=complement+object+direct+and+indirect+french+exercisesPDF link annotation
    • 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_off000129e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 19072 bytes
SHA-256: 393e5bc1127b4964e07fb39f68bbd078f4a89b84a2e20266806bbb7bc31e9a81
font_01_sfnt_off00015aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000172bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172BC 11288 bytes
SHA-256: d49f1309c15d34b01907c7f95e96e545f7ac32a3bfeb400d09982898329ee7ab

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