Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e6011676d561a1…

MALICIOUS

PDF

77.6 KB Created: 2021-09-05 04:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b5048f9fe65d1cc1e538254fe2dc070e SHA-1: 8d29288c757a95a8118e13b3bf251cf2b4120fbb SHA-256: d6e6011676d561a18bbe347644cbd1833a53f6570939897e621936caf350f7d0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://menu2uplus.com/images/file/56970061934.pdf In PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/73201337534.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/gudebujalabizosozobasexe.pdfIn PDF document text
    • http://billsky.ee/files/file/66217940306.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/34496554887.pdfIn PDF document text
    • http://standardamulet.com/files/files/46686394268.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/edbe5432f53ab961ea5d584c6acf2494/nirijerawexebesota.pdfIn PDF document text
    • http://flavourit.com/uploads/userfiles/file/file/xawuwofedejorotedinuriwog.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d38aba2769d---52113201359.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/770df35d4624f4d02c2daa9789e8b469/pujago.pdfIn PDF document text
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/vasepuwadaku.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/0974f427aa3f9fded74f361ed5393c29/lolapofubujuzi.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/48892841766.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021052216455886.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/vevuwapo.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/bctv63ivp7unbs9rq051tcnbv9/sikobozoxogujini.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/9a5faa8f98dcef6ef08f784a2d297e27/duxuzefavejapol.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/19933274798.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/kokof.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/71086731319.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/ce51a83a9731061a71293153d63e8b78/ginifinulowiwamerafofokaz.pdfIn PDF document text
    • https://okazionche.com/files/kufenewukusumigef.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/terovulidimileful.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=honda+civic+1999+hatchback+manualPDF 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_off0000cd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3C 10844 bytes
SHA-256: 2fe0d010062949da56f1ef2593b003013af31c7611f2d001ced424dfc2d915a5
font_01_sfnt_off0000e61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2F 16544 bytes
SHA-256: 68ae8679a853c51c9bdf23615b55b770e2cb50ed3555e38f65ba22853503a357

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