Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbebff7576df227f…

MALICIOUS

PDF

90.2 KB Created: 2021-09-11 02:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b2cc9cd13bc3076c80cd453eee3533d0 SHA-1: f0942a9512f89959dab0ebc9ad500e9116ee81ad SHA-256: dbebff7576df227f877afb8103ff075b25290c3a946210a9e63a0b2f7eb32ad4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload locations, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • 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.
  • 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://reylab.com/userfiles/file/xumebulajuzuxubol.pdf In PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/45746619253.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/90993684351.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/kagokavotutosiva.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/44876649233.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109020012353378.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/serixunibonuvi.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/31494328644.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/muxosabefi.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/ratisadarusora.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/janivikizusujona.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/62856757643.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b53acaba66---77971412667.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/1218556908.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/73104851735.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16137a76d857fe---75654883957.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16135d6bade742---44713550287.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/58439807500.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/wanibawesorivubedix.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/30524947506.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/deselamawunapumo.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/bakajowatutizavesib.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/72912880965.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/98536935663.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/1a0119b01fe8c69d9100cf1ee2de60f6/53422371177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=nba+2k20+mod+unlimited+moneyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 10808 bytes
SHA-256: 7fd43a4ecdbf04e8e2fb4ddc5324fdf55885461c9271d989c592a01f139c459c
font_01_sfnt_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 16416 bytes
SHA-256: 9e89827148f170d4bc38515d73ae405840edd377683616437240f0a2d07383d1
font_02_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 20468 bytes
SHA-256: 779acf470a84a899917dbda34249d39d0b48aefa1805a37110ee5494b22bb0ee
font_03_sfnt_off00014281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.