Malicious PDF — malware analysis report

Static analysis result for SHA-256 1304247ffdfa6b61…

MALICIOUS

PDF

104.1 KB Created: 2021-09-01 07:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4fd8014536708361ccae96da230d4e61 SHA-1: 4d85d0904f058cbc89777b4b99b3dbb21785b00b SHA-256: 1304247ffdfa6b6115b2221f70595ec5c7bdc80a5d96acafde38e1b585e2942d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=jersey+shore+silent+library+episode PDF link annotation
    • http://vizcsap.hu/files/file/92558871691.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/5b554ea51f3db293e85362035a7dd087/dipedoxisuvakerarisas.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/84304917896.pdfIn PDF document text
    • http://merwepizza.com/upload/file/18389818154.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/q2rle6u2pcrovuvh6pfll3bck5/52714548486.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/cb08e10943c59346b7b020bed8174a2c/41135467551.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/jebekopope.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/kolebowomovuzani.pdfIn PDF document text
    • http://strandedtattoo.net/file/18486227056.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160849d01777c4---nawufenaxitokeziremozuw.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e82812af0bdfe9cb8b01b2f17c9a761d/73689038024.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/rogetegerinif.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/n99sk0s44ur3pgu40llcs8qefr/27260541079.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d59d87693---51485854606.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/34725802801.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/wolezogan.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/42335843303.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/66680783401.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c22c5442528b5ad92f3c9b2f287d9677/26684419874.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5082aed72---82011273961.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/49303125485.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/48448000626.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/048448ed9121d6932291960fe31a8a69/27964064029.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/bl6gqub54245es0gev7sp9m6tk/1441928838.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_off0001307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14895 10732 bytes
SHA-256: 51ae237c0a366e9da7d003a428ccf8b9b552c5b1d0cf20767bd84f304528502d
font_02_sfnt_off000160f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160F5 18360 bytes
SHA-256: 40fc93ac1a0bd60a1745f1a9a2c0ef3b28a2eddc09d00b9d5b1fd257a9a6b37a