Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e48f6e5ba7b1e42…

MALICIOUS

PDF

82.2 KB Created: 2021-08-25 22:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 918d24669a492c52e0649933296b57b4 SHA-1: 822f407d4b029582ed2f468740ba4338f439554d SHA-256: 2e48f6e5ba7b1e42143efc0da433d5920b375e6e1642c98494495fdb360e3143
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lure users into phishing scams or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=how+to+remove+green+checkmarks+from+desktop+icons PDF link annotation
    • http://saigondome.com/uploads/userfiles/file/mobemi.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/532a55ad1fc47fb1d7f3fc31fd62d6da/70622088378.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f9848c4c---51904491702.pdfIn PDF document text
    • http://goldmustang.ru/files/files/vafakupimegavado.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/robajejaxamubumavasodepu.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c146babe543---72351745562.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/sadolomiterevoja.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/89552565403.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcf9da1b877---disoguzizupulo.pdfIn PDF document text
    • http://wsm.hk/images/files/lumozobiborofijuludalitu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6e933b284f2255040517f19bf3524cbe/37554395916.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/62025804493.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210605021759.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c04b825fe6---kakuzikuzuwoxupemafumu.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/bivatasojamode.pdfIn PDF document text
    • https://businesslife.com/content/file/56410811445.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kijasulase.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/52051625659.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/wobewubotivudaxofivif.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090edd436320---kogij.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fe2f806943f---81827388521.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/jofibawogiwifegevoribogaw.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_off0000db7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7F 11256 bytes
SHA-256: 904ecdec4cbead9bf2ce7bf8b9a8188a5c266f44031b426c3acdb0d03390ba8b
font_01_sfnt_off0000f58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58A 17016 bytes
SHA-256: 8c63983c45c635e2a919473c183f53b616e8355fb1d78259bcfa58b6eed9a5c5
font_02_sfnt_off000120f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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