Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0268eb172a8823…

MALICIOUS

PDF

75.1 KB Created: 2021-09-17 09:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4c1f195792fe3501cac18a78a9542118 SHA-1: 6bfae0ae3117eaac11ddc5f32d5de389f12229e7 SHA-256: 9f0268eb172a8823e3f74adbf98d4b370e70ad19c0b9c655aba0bf2e82d231bd
196 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and a lure for a password-protected archive. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs, while some are marked benign, are part of a larger pattern of hosting potentially malicious files on compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://beming.com/ressource/site-image/files/nuxorukogupuzisiva.pdf In PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614163d79b5b7---razerekamegofado.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/darizolavajuvagarifib.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/lapifimodogozuxadozurexo.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/98311790807.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/78906617593.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/44928098071.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/femen.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139f66424753---25940229604.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/zapej.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/10298606184.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a286e1198---25122789411.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-17/20210917105911313419.pdfIn PDF document text
    • http://vkts.se/userfiles/file/31305939662.pdfIn PDF document text
    • https://asiapharma.la/files/files/24185482312.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/00804bd25b177e8327a7d950f24db6b9/tilemibutefu.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/66923727824.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/71129855083.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613437e53a61a---tajetigib.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/gejim.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/77616745314.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/36542635522.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/32089464265.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/24953038966.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/47968134090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ppsspp+games+download+android+gta+5PDF 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_off0000c216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC216 16780 bytes
SHA-256: e9a81a10f235430ce9a417ad0d8480e0ca912ba1119084d27cfc9eef175beaf3
font_01_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 10956 bytes
SHA-256: 6b65e8ba25b60c64a3c93774d8a224ad1e9506aab537823aa50f3a7245f90fb5
font_02_sfnt_off000106ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1