PDF malware analysis — malicious · b466eeae3c695c4e

MALICIOUS

PDF

80.0 KB Created: 2021-09-09 06:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 214f2f7cf7869f3d66b4cd27d208ed48 SHA-1: e4721e5c4aadc07b255ba77868dca49326e67512 SHA-256: b466eeae3c695c4e8a44aa27ab3a9e062ccd0d59cb5852ddc46390237c3c3565

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of urgency language further supports the phishing lure attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://oniceh.ru/uplcv?utm_term=lds+tools+apk PDF link annotation
- https://organicearthfiji.com/documents/file/vigolosegisijexutekoni.pdfIn PDF document text
- http://acutecardio.ru/sadm_files/6998127718.pdfIn PDF document text
- https://doitoutdoorz.com/file/nwnRY1Sab2NcJwDn.pdfIn PDF document text
- https://andhimazhai.com/images/files/rojukesemujoriz.pdfIn PDF document text
- https://agri-mal.pl/userfiles/file/vijomazubutepemutanore.pdfIn PDF document text
- http://trongtinpc.com/luutru/files/wifurokoz.pdfIn PDF document text
- http://xn--365-pn7mwb654m2qn.com/ckupload/files/lemezijafu.pdfIn PDF document text
- http://abwfinlay.com/uploads/files/wigixigopakarifu.pdfIn PDF document text
- http://fixafilm.se/userfiles/file/164695305.pdfIn PDF document text
- http://cs-golfclub.com/ckupload/files/57116425578.pdfIn PDF document text
- http://montagnobozzone.it/userfiles/files/foges.pdfIn PDF document text
- http://noithattamphuong.com/upload/files/49844386160.pdfIn PDF document text
- https://gangwontaxi.com/FileData/ckfinder/files/20210901_D9C88ED75B57C0AA.pdfIn PDF document text
- http://ave-france.com/pics/files/32025658204.pdfIn PDF document text
- https://posh.hr/files/wanesunamosig.pdfIn PDF document text
- http://kenhuffbuilders.com/userfiles/file/27271032443.pdfIn PDF document text
- http://kunmobile.vn/files/uploaded/20210905/file/51469478920.pdfIn PDF document text
- https://efsanepin.com/calisma2/files/uploads/zuvatuzokefimavesa.pdfIn PDF document text
- http://icsbc.ru/fuploader/file/bufatoposu.pdfIn PDF document text
- http://nguoiquangphianam.com/uploads/files/49792450741.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396ac0d7b42---52422660784.pdfIn PDF document text
- http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/zixogusudu.pdfIn PDF document text
- https://mami-m.com/Uploads/userfiles/files/20409005941.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/867aa65c2a6262ef1cd1eb59e27d10d6/29958952515.pdfIn PDF document text
- http://pune-india.info/userfiles/file/23172962727.pdfIn PDF document text
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d757.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD757	10004 bytes
SHA-256: `8fee97959c5e031e8e648662deed00798c4f4659a0cd8add1da08e90c6994cdd`
`font_01_sfnt_off0000edac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDAC	17236 bytes
SHA-256: `bc07c87c11d447cd5c7bd24e7843a87eaed2b8a8f90666de265fadbcc5965cc5`
`font_02_sfnt_off00011a71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A71	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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