Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba857e8f26ebf26d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-14 22:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27ec4d1fbf4c15c5b512ea8122cec5e0 SHA-1: f1a47bd4d9dbd990b9160fdd8a5ecb95ddd16b99 SHA-256: ba857e8f26ebf26d334899fe88825cd3f624d0a13f4fc4dbd0763360a31b67c3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a link farm, a common tactic for distributing malware or conducting phishing. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities or the redirection of users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bagiez.com/userfiles/file/pesover.pdf
    • http://izhar-energy.com/userfiles/file/97489370525.pdf
    • https://ddtoyz.com/ckfinder/userfiles/files/30581772543.pdf
    • http://impex-italia.it/userfiles/files/nizesamosajekum.pdf
    • http://zhatuogz.com/uploadfile/file/93748309457.pdf
    • https://copab.tn/216mag.svn/uploads/files/82396230371.pdf
    • http://rsti.biz/files/fck/file/31655831365.pdf
    • https://comtraining.cl/userfiles/files/gogaluwavofumejikelozifa.pdf
    • https://agronlogistics.com/userfiles/files/kepitenimomubadevo.pdf
    • http://frutapacargentina.com/ckfinder/userfiles/files/60758506543.pdf
    • http://audyt.rowerowaszkola.pl/imgturysta/files/88473138962.pdf
    • http://vln.nl/files/file/kopumonoluzofagidakib.pdf
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/3960167852.pdf
    • https://unitedfightalliance.com/ckfinder/userfiles/files/48407596178.pdf
    • https://atvatextile.com/upload/ckfinder/files/gosub.pdf
    • http://retailcop.ca/files/xomusi.pdf
    • http://svadbavmoskve.com/content/xuploadimages/file/63988260326.pdf
    • http://peknanevesta.sk/media/file/97108648812.pdf
    • http://roomyab.ir/basefile/roomyabir/files/44584793366.pdf
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35315236784.pdf
    • http://tranhdaquydep.vn/upload/files/zowoz.pdf
    • http://footstepfloor.com/upfiles/files/89556383383.pdf
    • http://cantinachitarra.it/userfiles/file/nidadobug.pdf
    • https://loyallcanada.com/editor_files/file/pazodakerodazukomedozed.pdf
    • http://personnelstrategies.net/userfiles/file/59294052527.pdf
    • http://travelci.ru/ckfinder/userfiles/files/85581191636.pdf
    • https://cqhuaan.myhost360.cn/upload/files/09-07-01-57-23-87.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pes+2020+download+for+android+psp
    • 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_off0000e1d6.bin
bc6ba5de209682a1d1ac72dd85a1618e3579caebe251ac54165e318e313b1388		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 10720 bytes
font_01_sfnt_off0000faaf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 16792 bytes
font_02_sfnt_off000112c1.bin
a6f86efee238dfe3cba875cabff2289f911ed715dc7f5531ac89829b94e0b0b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 17612 bytes

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