Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbe0cf8c9801c24…

MALICIOUS

PDF

91.1 KB Created: 2021-06-25 20:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccab403f948958cedc4cdc55ec5f1a6b SHA-1: dfcc809942abbe1da45a27587c3a2020de50dd4b SHA-256: fdbe0cf8c9801c24667419755555e58df99d9e11fc423fc850da9ed2c8519013
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The presence of UTM parameters in some URLs suggests an attempt to track user engagement, common in phishing or malware distribution campaigns. No scripts were extracted, and the document body was unreadable, but the heuristic firings strongly suggest a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://huntic.ru/uplcv?utm_term=autocad+latest+version+2020+download+free
    • http://lateonsettay-sachs.org/userfiles/file/71495343594.pdf
    • http://abnicum.com/files/file/86210229617.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/1ef0d0c6164a7d8253e8a289bd88570b/1025290756.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c23f498b8---73738063318.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/16801a8cbd238dabc9dfa318e87506b1/lakivulo.pdf
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/lokovokotejabekunis.pdf
    • https://mn-lawfirm.com/box/userfiles/file/wedogizizejiwe.pdf
    • https://deesudcoolingtower.com/userfiles/file/sokedijepebi.pdf
    • http://wannawwannie.pl/userfiles/file/jigafupi.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3eaa20c40---29666473636.pdf
    • https://circolodelpistone.ch/userfiles/file/dipuxawe.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609284fc6b867---82097512661.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/61a0c29f4df67401b8cb1da26f4ac2a5/mamurepolifefiw.pdf
    • http://cathugo.de/res/wysiwyg/file/13979224417.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/291093e3936c21005c0f3264eac12347/perowodifu.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe7ad314dc54f7baefcd1adb09f71c60/46830963955.pdf
    • http://koreaseals.com/ckfinder/userfiles/files/zirivonakafexupama.pdf
    • http://dajuicebarus.com/uploads/files/rutufogefeti.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99379d63dd---wazawomexur.pdf
    • https://ayurvedaemart.com/uploads/file/26048434989.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/df938f4c1c15967dfe6a2387c18276ab/vipoketepa.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607556d2a1292---77118324396.pdf
    • http://posekatzahradu.cz/files/file/76892218957.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cffddccf5b9---22836329233.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5b3dea9fe---43874317197.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097dedc6c4b5---nisulodegenogumirumu.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_off0000f081.bin
3e7723ea1ba4dd939f2c4a46fe40cead658ff565899b9ca564fc47aa66fb592a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 30332 bytes
font_01_sfnt_off00012b21.bin
26fae2b69a6787b4823f74c86acf133b5a98c87f9114df4923089e90d3ea037e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B21 10944 bytes
font_02_sfnt_off000144c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144C9 16792 bytes