Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fe38959d3aa6be…

MALICIOUS

PDF

91.6 KB Created: 2021-06-29 21:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8002aa0a18ce4d73db5ab694bd3d42f8 SHA-1: 0baa46bb17406b12e002c01e3242cadb9a7497f3 SHA-256: d6fe38959d3aa6bedab5d3c23597d5c1ecc6918e2b52128631405662502c6881
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The PDF is likely intended to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://meteosputnik.ru/userfiles/file/25685007850.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/94d36bbe4d726a5b3e1b7b0b45fd2f6a/29133116541.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8d54928a3---29180513565.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d2145e2e856---nasuvek.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c709f5a1335---pulimikiziwuxiludeso.pdf
    • http://xn--b3ct0dc9bc4a4g.com/userfiles/files/93252165913.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1d40e543aeab2ff52671e12c7c668124/7455355291.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/5861b418d468da734534b04871707cce/92436738390.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/99ce8985e9ed9c325f6aea438ecfabb6/puxobokudegisimurasapude.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca019bb5aa---bositotixawadox.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/d0523b1aaf70cd39fa12b8f12cccd66a/tewokujepejibagis.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/36195813196.pdf
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/4242014197.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qcdtln69i4g8rae3tafli9gftb/1179782138.pdf
    • https://xn--nmqu14inmf.com/upload/files/mosuvuripi.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3e7f7db601d0b75a15c6d0a72bf6aaef/begetej.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/2hc984bb8euessuq1fi5cpriu6/6833253524.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afd71ac7c45---bilovunan.pdf
    • http://np-laser.com/upload_fck/file/2021-6-20/20210620044411598642.pdf
    • https://lawyerupsmart.com/tempimg/file/tupezino.pdf
    • http://fzcce.com/aimgs/uload/files/pezonekofawasisebikuze.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/17bj1krd5iq3iodpg8198eua71/33612971010.pdf
    • https://mujeresenmovimientoplus.com/userfiles/file/jefefav.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=erythrocyte+sedimentation+rate+meaning+in+bengali
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 16792 bytes
font_01_sfnt_off00011584.bin
92f352b02a36717cac808b691b5f6fe921b8694809b3be0f49d15e56e603e950
pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 11052 bytes
font_02_sfnt_off00012ede.bin
4045cab4b5971da7c5c2221f4d5d1c1e35c5fcc339707458b699958b2c798c40
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDE 19216 bytes