Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02bf243ed60c033…

MALICIOUS

PDF

83.5 KB Created: 2021-09-05 15:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: afe352755545c1ed8167373796a6557a SHA-1: c741d654a160dc3dafd8ea3729284acf9f57a715 SHA-256: d02bf243ed60c0338fb6fb84627183be95a25e08a43bed4c3a25d1d07b04573f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS upload directories, suggesting a distribution point for malicious content. The presence of numerous external links, many on disposable hosting, reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://alakharia.com/public_html/userfiles/file/tisitokagos.pdf In PDF document text
    • http://kor-ra.ru/UserFiles/file/49392961830.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/1spuoqn0rc5jv3mi7q1d5agoap/3766858780.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c05085c1cd---fukisedevilijaxipiz.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c62f36ea---totujatugudepufubaralul.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f48797ff7cb6c50ef1333f6a7fa96ec/ronutuvoz.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/mufasumenusunapabesomuvib.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/nenemevopepa.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608492d828467---jopugenokadurivi.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd538e0ea5---27722333329.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/keredeje.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4aca3677cdf8e548621c01cc6777ef10/piwuwuvegefubajogaleviki.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/gijunuwa.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/252tlabd4ktco3r04e0g4aubot/1518363802.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/24355698746.pdfIn PDF document text
    • http://sergey-yushkov.com/pict/file/58674307694.pdfIn PDF document text
    • http://ournextfamilyreunion.com/clients/4/49/491fb30de6d8464ca6518fa43aba5bd5/File/54087119351.pdfIn PDF document text
    • http://erdbau-rauch.at/94140509205.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9d7bb543344c6c81859bc9ac44454382/zagujumazikikedabasofi.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/3mfnhv0ukahaqaqfhsdi3338kf/17703880655.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/pivuzepolaf.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/jogalug.pdfIn PDF document text
    • https://dptech.vn/uploads/files/16359890532.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/56912866882.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/c9cf8b4188fdb707365c463cea1b583b/wibulodemiruvixoxidug.pdfIn PDF document text
    • http://yongqingtech.com/d/files/vikisapomixijas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+dark+fields+alan+glynn+pdfPDF 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_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 10728 bytes
SHA-256: 34fe7024ca62b3a6754285c4a2754bd1e3add125aaabf0f302a0313c6f13ce05
font_01_sfnt_off0000f867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 18200 bytes
SHA-256: 90ced3f567c3c5bf92cbece7c64b176b09e2298dde74177af0504d90dd4f96a1
font_02_sfnt_off000127cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1