Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc29a69cad3b19b…

MALICIOUS

PDF

222.9 KB Created: 2021-07-06 19:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 91e8a49311fe7bb24de00e807b04c1c8 SHA-1: 2ebc5595b1d525eb7821d839bef4e9f6771d4e69 SHA-256: 5dc29a69cad3b19bb4737dda38fc5cd8b9ea3711fed83730c71ab866c075dd24
126 Risk Score

Malware Insights

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

The sample was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, but the presence of these links strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 5

  • 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.
  • 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://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f02ce2396---nikakizewukoxeku.pdf In PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/thhc41r9c1vlqh49m3ul8lt49h/bebabirilugaruf.pdfIn PDF document text
    • http://leguido.net/files/neroganosijerosurivamupov.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/89432a0f8d74548b46057fe10ece8e67/nubibarejeriwop.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/g23kmu90sljomi2qbfnop98ips/54327327828.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/003e2adf58b926c2f1186b43f199475e/kabusagibudipamudusejar.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ejt0dugeshikeart8brokdt4h8/14126528831.pdfIn PDF document text
    • http://learningkey.org/userfiles/tanus.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c2301e9a6---1699165585.pdfIn PDF document text
    • http://www.toptehnik.si/images/soreworizifug.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/lfgs9g9l9scuqrqbsbbkpuf3j7/10009975500.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c55cd672933---1729937315.pdfIn PDF document text
    • http://amandamaitland.com/images/file/sazaf.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/xikobasifoxe.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797c9436a03---rikejusasosumurafuvidip.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/0e3411993457871eaa6db0a5cf327294/dubafipirivepudukolumo.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/2mm412gt5dbgnahk44n5ihrib5/51537534844.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160730308edf63---veliralo.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/3e2brglpt19sb6fjtm28aoe8cb/wakuligejirekot.pdfIn PDF document text
    • http://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/47728932686.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/26r3ihueu514ffgp8iiv31o6u5/xuvezilopibepexupap.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fb550279f8b0ff78a741592db396dd47/dulukuz.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/382b518a6729947718fe33aadfa58bb3/30733423.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=encyclopedia+of+literary+termsPDF 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_off0003100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3100A 10880 bytes
SHA-256: 65d7fbddb36b24d471b42715262881799670baf654189f89945237717d91e748
font_01_sfnt_off0003292e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3292E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00034140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34140 17396 bytes
SHA-256: 95100c78522fbeb318e8be4b720047eef4fd8be8fe96a6793774e4460e20daa3