Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3292857cabb2442…

MALICIOUS

PDF

76.4 KB Created: 2021-09-07 08:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f32188590ef985d69b1d53283f4bb470 SHA-1: 2182d41ae5bc5defaa75cd1a5ac14f2c7bdfc89a SHA-256: b3292857cabb2442bea75e8c30c09ddca5c55e51e7f947de65ebc5935b030dc6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS uploads or disposable domains, suggesting an intent to distribute malicious content or conduct phishing operations. The document body is heavily obfuscated and does not provide direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://goldgreiner.de/userfiles/file/43565066736.pdf In PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f115fda2a4---jawalugodiko.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/35792767560.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/furamenakop.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/79778858589.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c698c53bb90a0500a7592615fe396fc0/4521107308.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc7f88a2c46---8199236395.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/90277cc2dbf4ce1a0309cd113a98880d/39755187930.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/lizex.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/jerot.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/11448388582.pdfIn PDF document text
    • https://aneri12.cz/res/file/23237371280.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eccb82cc7---wafavadasaxexunufak.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/gunojipezirupoj.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/bunutefatokijuvalemawemu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c8d2917b61---zadomojuzawugaxojagowuk.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160afc064849f3---36607286819.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/kidolosujosigekobubowas.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210730_3839E38F7B3FCE8A.pdfIn PDF document text
    • http://llux.vn/uploads/files/81764879966.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/dibegunavadetowabem.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/tunawowexugipojup.pdfIn PDF document text
    • https://bursac.net/userfiles/file/segivatuw.pdfIn PDF document text
    • https://linardi.ru/files/file/lanovez.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/zeponifupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=biodata+format+for+marriage+for+girl+download+pdfPDF link annotation
    • 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.

FilenameKindSourceSize
font_00_sfnt_off0000c82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82A 16520 bytes
SHA-256: 05d05af238bc5263086d06cad500bcf24bd9ab8998488fb8437660682508e1d0
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 10812 bytes
SHA-256: bdb16fb9752b938c3c8ccad1f7f33e8d161ba2434dab3ae2a2ea541f9dbacac4
font_02_sfnt_off00010bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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