Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9126f0cf1de5b77…

MALICIOUS

PDF

100.2 KB Created: 2021-07-13 16:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1c8f63256cd7e39c892debc67b055af3 SHA-1: 89c51d078a483c0e12187ed09fe6012e58f77ac7 SHA-256: c9126f0cf1de5b77649ace4b9e1e82c307d95a2c735da777782c147da80a3d27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a large number of external links, many of which point to disposable hosting or compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=red+dog+canine+center PDF link annotation
    • http://infrabud.eu/fckpliki/file/47969009828.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/22444152a52a9c00b9dc68d79173de84/80406282533.pdfIn PDF document text
    • http://edgecs.net/documents/82146123362.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/hjq676g6spl23o199i82b3395p/gununaralaxepefipajepuk.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/43374415245.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/65281404318.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/76885167301.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/serekew.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/lawefakasawar.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/db0ecebea24040354741b52179bb471b/roxiwefekijomunaxu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb7b18324c---6354095308.pdfIn PDF document text
    • http://quatang3t.com/upload/files/volijanumapokigoniroreb.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/gtvg7r1k5q2h4ura58a9pr16uj/relugetamupofakerotipep.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/81433282136.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/2135938363.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/57295323465.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/8265a1ff0dd25f820c7c3fcaa4f3b14a/kenadozuxaxetezu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/3797c22eb6bc70d2fa8704954a0cb356/teligixuzitazagomax.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/41979420303.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0fd2c9f58---luxarivigetevapoxirok.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/wobamizofa.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/ffb28dda63bd4d569a0c10ba675a9e6e/50079294439.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D3 10376 bytes
SHA-256: 5eec16319461ed485ad02f880d62b1d1e95b2b0afa110e1c74270847b4507e73
font_01_sfnt_off00013e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E31 17100 bytes
SHA-256: 177e47ec74f15c58f3f76156bbad5994721173b3f0b0f572bb33e8eae721569c
font_02_sfnt_off00016a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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