Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c309126ad64bf00…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 07:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: aa02415c0f95dc9ce22953f874395c52 SHA-1: 434abc1f42ee6bbfdee5aec6ce5c6fb127e70a99 SHA-256: 9c309126ad64bf00168967a20e574116c5773afa744da294cecabd19ce9452af
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://supermovi.com/userfiles/files/gomadudamewije.pdf In PDF document text
    • https://saikekanglun.com/filespath/files/20210903043751.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/3230fca3eb85cd2dd7963c73720294d4/vegadusudunonanidaxi.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/bunobefi.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/loxadategulidiv.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/titiloxuxubutokipozodip.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614825f347773---9618979658.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/tojevikenimobuxezoxepi.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/rebegonutadu.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/66311446147.pdfIn PDF document text
    • http://saktigroup.in/uploads/feduwijovoxa.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/851c65f1ed2d01e4ad1884af6351514d/goruvubiwo.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/tosidubototunawiv.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/gibosemone.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/10806860501.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/biwitidoletofonuxaponito.pdfIn PDF document text
    • http://geotersrl.it/file/xupamozotetukagu.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/sepunozegaburedovif.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/juxatox.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/83115477657.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/teturojuwo.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/121900206266.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=isaimini+tamil+mobile+movies+2019+downloadPDF 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_off0000ac9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B3 11016 bytes
SHA-256: 05f3b485ed2c7261c84265053672523deacf76208315c2ad09ce306ec6086ffc
font_02_sfnt_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 15172 bytes
SHA-256: 3b5fe97e1339d2d885733eb9e9a32a0f645511a6dfcf80e9e4cbd0870e84033e