Malicious PDF — malware analysis report

Static analysis result for SHA-256 f098751a842cecb6…

MALICIOUS

PDF

88.5 KB Created: 2021-07-04 03:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a7a16e801ff25e35a9f9119ccc7221b7 SHA-1: 72fc52e37bbb7d336794cae17f6eb02dd5a0545f SHA-256: f098751a842cecb6060fe70a5369e732718575946d572b2e83a7d58e064ac190
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, indicating a high likelihood of malicious intent. The file contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketchas.ru/uplcv?utm_term=what+is+empathy PDF link annotation
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/3bc6bcee208e8448b7e99709a949fda2/rinukopenofezupoli.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/pifakulipupa.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/25d5a9ba45dec1cfbcbf4ec1f924eda7/22675790171.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/39528481309.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae6a920a0---64555045452.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/fukopuxupotokeroluzom.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d074fa7e92b---76764503729.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a790448dff---kanofukozeramizotigifari.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/93156844540.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/rukitajutu.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/84351091039.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/05/20/file/20210520_173638_114.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/jitoduwu.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/7b009f088a02a7454e07faf9319ff7e0/bimemasifor.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/losariluvedeponozixebe.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b74921c8336---95372442852.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46d110f2ee---93974867303.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/tumugeligujusowamiwi.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tor3a23gsngn15re9kj71rdvfu/pozobifidesig.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/q5li3rell5r1csbf8upcp4bbua/ritovu.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/b95e78kugp68q12t9k8a9p9ist/wowizekexutirodu.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/29536693674.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/mujupulurozovupugarawu.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/22766504381.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_off0000f839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 17680 bytes
SHA-256: 4a4a0e0d4da3f82e205322b2b84b03580646915f4ccaa530dd5e2269b13f0ed1
font_01_sfnt_off000125d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF0 10256 bytes
SHA-256: 1ecb7d89e0cf3fcabf9666362f309244c1fac36539379ff3609a1f2858ac2781

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