Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc3c7a8faed31e3…

MALICIOUS

PDF

87.2 KB Created: 2021-07-13 17:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8a44ea3723d622358b8d351210b89c1 SHA-1: 18b8a8e207b5601b28651ad653b0e83b801eebdb SHA-256: 1fc3c7a8faed31e3db4a6bfb2c9ef2adac97f5308000aa61e5d40b7eb61cb793
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ludifrance.fr/userfiles/file/folaxivadu.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5d46bd020---vumupawiwusin.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/dbf85b9d5c1875a9dbbffbab9126e3b2/44030339569.pdf
    • https://eghamatkade.com/basefile/eghamatkadecom/files/fibodetusunosiwokunilowej.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebb2abff02---48101325071.pdf
    • https://atamergranit.com/userfiles/file/tegugumeripo.pdf
    • http://webinaris.net/ckfinder/userfiles/publics/files/75957566363.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae99e9f20da---54239572485.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/2d2umaaauia4jeo23jchllpdpd/wujuwijixedokuvexiri.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608816931337c---mibewunuvipotafakige.pdf
    • http://duetsepolno.pl/userfiles/file/vigexixemofizagipepazisaj.pdf
    • http://cortabellanews.com/userimages/monikitivuxuv.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16091aa63402d5---49425871219.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075863dc6d33---vafaveved.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/dc44c53b960aa6728784e66d5b69f4e1/kinerolivinanalata.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/7a8b6457b500731f3df430997524020b/62980571052.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/27f67c3a8ef7643da6b3fca012b1cfee/bosejudugowetufawaseri.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/c970e299330f2b3042713be823f3f2a9/95408150456.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/gjg6p7b5gjf08lpbn39gd87v7h/wotatoxebuvotifisenasudef.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b11186b2e---varosolezobagitofofe.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609416fe4a95d---72351817893.pdf
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/monetumetimulezodot.pdf
    • http://novichiha.ru/pic/file/mimelisibapa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+prayers+to+say+before+bed
    • 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_off0000f21c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 16792 bytes
font_01_sfnt_off00010a33.bin
091577d54cc2668b0707bd73650a59fae5bf59c9c5d0c9c8510004c2bb2cc843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 10556 bytes
font_02_sfnt_off0001223f.bin
a5b9e83524869ccafaed2d51f416252ee651b4477cd918078b06cf8dac98c799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1223F 17244 bytes

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