Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b797a2cd320b268…

MALICIOUS

PDF

80.1 KB Created: 2021-08-12 04:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a2ea9058d4c2753e5b7a83f15b2cba0c SHA-1: deba1996a666c031fb13fe70ee3f0da164c7db5a SHA-256: 9b797a2cd320b2680e3146eaa1f958e1b10a3186089caa2731af65b2de8e3e49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://j1medical.com/uploaded/file/tazapisofizawo.pdf In PDF document text
    • http://harnettcountyhba.com/userfiles/file/bovugavegezafasujari.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97592ee2a---52405112472.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/57978477ce313a1e8b0191e4d29e6da4/62452611915.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/fa93a9327f7534f795a6f31649335b3b/68246069647.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/92704117965.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/pukerukiwidubegi.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/42931140653.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/160c4cd711a5d3168c15423bfe7718f7/42001218576.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/28544790905.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/nesefusotatojimumux.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/beluxawunuzudix.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/mejoxalularekevone.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/75491136952.pdfIn PDF document text
    • http://www.kammerpop.de/files/file/7645325736.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/fafulip.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/98441995014.pdfIn PDF document text
    • https://artgreen.vn/attachment/files/putomogupepoziruw.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/biwidejasaxinaruw.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/bixuvetusisigimobekerona.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/thahgrbcvtq3eruhfce60oc9g1/87195807499.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/90b8bcf654ec022f0e02cebea083f94d/zizowibow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=living+buddha+living+christ+pdf+free+downloadPDF 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_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 16472 bytes
SHA-256: b4b9b7bce4f8448edb9d26f23dc9d669cde612327f2e688b28d08d4f45d65d4a
font_01_sfnt_off000100c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C3 11248 bytes
SHA-256: 29f6e981701abe58820744729b1eb0ea724ab064ba17fe9c348aabbbd6908e0b
font_02_sfnt_off00011ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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