Malicious PDF — malware analysis report

Static analysis result for SHA-256 9079d77455b4cacb…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 16:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 08909a3f980b69c0f5ae9358ed75fd20 SHA-1: 108988a20fddbf98cda6b04afd64cc5dc35872b6 SHA-256: 9079d77455b4cacbebe27c0c60d93983738169b51eb193dbff9bb1519f4698b8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document exhibits characteristics of a callback phishing or tech-support scam by presenting itself as a lure related to billing, refunds, or security issues. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is part of a larger phishing infrastructure, likely intended to lead users to further malicious content or initiate a fraudulent phone interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/a2850bdc84efe12ee940fee2c79ae943/35258774513.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4480af41341069114664b9860aa4f182/44386614982.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210717160156.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/galomofijake.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/90954685163.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/14779449386.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/29295424769.pdfIn PDF document text
    • http://it-hair.com/userfiles/xupagiwegodevon.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/97bf9c6173a726a91b9636e6c0f623a9/telimijonezawulivo.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/3028cd683a832d5226b68ad4213de36c/pituzixaxiw.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/puzuvizuzepubiwir.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/1o45n1uut773e5s6avur6v11j1/21069789272.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/47619052942.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/sofesevexux.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/161092520ca373---xapewisumepa.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/nifav.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/magarorerakiduxazutebozu.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/0egpd1ih1bavpn627u8a1d0ji6/78749945227.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3cb72b9eb---xexikurog.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/42972151299.pdfIn PDF document text
    • https://anaksemut.com/contents//files/28218408680.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607de871da2d2---65881535612.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/jjn524tb4nkqt2oebgjrpd8d54/3118100681.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/65200041934.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b1d8080b---revajomapinorebazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=foxit+reader+combine+pdf+pagesPDF 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_off0000d538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD538 17708 bytes
SHA-256: c4ec88733f17e4cfae6432d3c2980de843530c79ad6c89355fcd29d3190cacc1
font_01_sfnt_off000103cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CD 11136 bytes
SHA-256: d20c939e0fb2f7dd0bfb3853023eb8c3fe241f33ecba65e04d1c35ca4e6f08a5
font_02_sfnt_off00011d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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