Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3a60f8576e78d3…

MALICIOUS

PDF

73.2 KB Created: 2021-09-08 01:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9dab4c0d0dcc85b84ad7e11b9843e5c2 SHA-1: 5de0503a19521af93391976e3eaabe80eeacc6d3 SHA-256: 7f3a60f8576e78d36a6bbc654c2cc1398c1a66f54e4d7c69d32a1fad85cb965c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=constitution+of+pakistan+1973+latest+pdf PDF link annotation
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/79657846921.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/80025173277.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/78a3ff895716e650232807bdd098acd6/52369025364.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/bpme2i8q96ooi4n91m722g0n9e/71398753276.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/17555377660.pdfIn PDF document text
    • https://yellowstonewildlife.com/49134036420.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wupofisumon.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/fc7c40cb7bcc973fffccc7e2e12ee9a1/mukimevekilokotirovexe.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b9e13f2a---77805900472.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/zupob.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/35339577574.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc98c7586c---46676664733.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/93825372009.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/11261311607.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ca0644cb---48641219989.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/titef.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/zopogokiwo.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/lumavaxomiwukuxas.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/84021936453.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/1807c3316c084d2ff8ddb38af26b8e31/40920638859.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/85014165277.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/memufad.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a036cc4fda---15040841961.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/6579476938.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD4 16500 bytes
SHA-256: 12567c6728b92ffe56948f95f2b8cdd00d70354f388e235e079a10e91384ecc0
font_01_sfnt_off0000e4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EA 11056 bytes
SHA-256: c44330e8f76ed36ab87bbae388f5e2c5703da5ec0287203c59a0309c69f4b7f7
font_02_sfnt_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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