Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d6f26f29c6e7ac…

MALICIOUS

PDF

72.3 KB Created: 2021-09-21 16:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8eab2c4dfd8fa6e67eb4ec298bac9f6c SHA-1: 8b963e15764abfb5b9c67623dc7c52d1248860d4 SHA-256: 96d6f26f29c6e7ac8f6e8631a3f752fd8d97e6b5d1baccad88395d46a1ef6381
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection for phishing and trojan activity. It functions as a link farm, containing numerous URLs pointing to external resources, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://hoshitorionline.com/uploads/files/xewebojalewabajobofujuwo.pdf
    • http://conhantaoankhanh.com/webroot/img/files/62842815404.pdf
    • http://hakanhurdacilik.com/userfiles/file/nugexolitulapetekib.pdf
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/nuxisidesakivadopowe.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f83a198a7---67800770646.pdf
    • http://theflowermaker.com/uploads/File/naxiburujilir.pdf
    • http://lynxauto.ru/userfiles/file/jugisodekefivaxiripatuver.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452c2ed6881---45034741543.pdf
    • http://brunagabriele.it/userfiles/files/29090309364.pdf
    • http://ahzycw.com/upload_fck/file/2021-9-19/20210919060703445030.pdf
    • http://centrons.com/uploaded/file/167329275561364f50f14cc.pdf
    • http://maudchristan.nl/ckfinder/userfiles/files/11379266935.pdf
    • http://nilesk.com/userfiles/file/75023167927.pdf
    • https://www.tvmreza.tv/ckfinder/userfiles/files/faluripusoda.pdf
    • http://findusafranchise.com/files/files/75297376199.pdf
    • http://sp3siemianowice.pl/userFiles/files/96952759887.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dacb28213---zaxubanites.pdf
    • http://ingegnasrl.com/userfiles/files/fepenozubokipemus.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6456845ab---fobexugojex.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/d9cfe68e1d44818e59412e8740809748/wozawuru.pdf
    • http://giaphatmed.com/upload/file/lewivi.pdf
    • http://fli.edu.mn/ckfinder/userfiles/files/lowotule.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/39804774133.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sampling+techniques+in+qualitative+research+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7f2.bin
9626e1b3dbe0f877a6eff660e8f71f552512864f4cb35dbaaa734083653dcb0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F2 16316 bytes
font_01_sfnt_off0000e1b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B2 16792 bytes
font_02_sfnt_off0000f9c9.bin
1b6843211a77839e752e8385ad45729d3d789063aaa5c6be97e9d4f7a3cf5f1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 11332 bytes