Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdeafe2d8774fe3…

MALICIOUS

PDF

87.6 KB Created: 2021-09-18 02:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: efe1199f7bbde3620eb3f20083d24d8f SHA-1: 7d641fc4a55888d720a5bb2bd16f7a15a8c00e4b SHA-256: ffdeafe2d8774fe328f692981b1c82cd0ad296f018ae986e9ad20ab24ecb0e7c
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan. It contains numerous links to external PDFs hosted on various websites, many of which appear to be compromised. The presence of a 'download button' lure and SEO poisoning techniques suggests an attempt to trick users into downloading malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dragonexpressml.com/userfiles/files/tujufoduw.pdf In PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/falovaberi.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f80144e329---wufotidupuzox.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/neminodovaveloduvatanivi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326b6817081---46074155253.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/xovinaxeforuxilofomakij.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/15817633609.pdfIn PDF document text
    • https://www.servicespace.org/inc/ckfinder/userfiles/files/49474381773.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/kuxoxemapajaxakukevozo.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/95539789195.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/27142773474.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/japogosid.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/45277950090.pdfIn PDF document text
    • https://cet.sk/res/file/gonazufivokupulop.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/63304909465.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d7f87645d---22065169696.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/zexerix.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/23342768818.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/8896334159.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/zitajofegabemaj.pdfIn PDF document text
    • http://indel.sk/userfiles/file/xibazexurofovi.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/fidurut.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/mukakesosiv.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/14105161639.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/65854658970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=play+store+app+download+for+pc+windows+10+freePDF 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_off0000ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 19344 bytes
SHA-256: 3e53ae5470343781ad83ec0e2ebda96748ed53c9c6e48ca344c7848bc8498b47
font_01_sfnt_off00011e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E97 10988 bytes
SHA-256: 2dc5255d2c4a2dc322bd4c025fff43bed188bbb1e39e99c6bdaf8db809747717
font_02_sfnt_off00013868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13868 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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