Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb4f85b238a6f5f…

MALICIOUS

PDF

79.7 KB Created: 2021-09-23 02:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 129854e8a89f1b8bebe27d963ece30a2 SHA-1: 14fb02cbf28b32f0e1be8c2f28b2c1ca91b1da61 SHA-256: 0bb4f85b238a6f5fe2e544d5dcd1eb8b7d89f28945db1a4a1d4c0e8100d71ea2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous URLs pointing to potentially compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://mfcpavpos.ru/file/pitexaxabakevisapuzeje.pdf In PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/xumoxugafonejodaratinu.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210911_212516_195.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134af6b72e6c---46223433200.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/bureripupejipa.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/26114721326.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/mimuxevadize.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/jolezoxebozodita.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6264c6b98e3fdd94ab9684bbed01afb9/vunokazanopadawuborexib.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/gefifonevidep.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/41210407627.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/jofaja.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/wajininubipuzejevalevase.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/o3m9bj1gfn5b7plkt9jtn39eu2/dobuwedodomux.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/15372050875.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/61816839017.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/5285820618.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/guburatofirelimox.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/pajigulo.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a53426a612ea7ccec59d84b9d927dbab/zizujuwuloxajagizolituzuv.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/5012276431.pdfIn PDF document text
    • http://melvin.cz/data/56611455364.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/96779074702.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161491db36ef76---39341084053.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/xotedijamisobisumogof.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/somutebazaxusekapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+pay+with+nfc+on+androidPDF 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_off0000d32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32C 17708 bytes
SHA-256: fb0fd5e78e5239a9ce9999a9476f4fb46f9fda42a754e275f01ad213ce7db69d
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 10564 bytes
SHA-256: cb925c3d8419f5bf79e468ba3530c56ee39f266243dc691887ee4f63cfe51fe5
font_02_sfnt_off000118a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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