Malicious PDF — malware analysis report

Static analysis result for SHA-256 485792f239c616fa…

MALICIOUS

PDF

85.6 KB Created: 2021-07-05 11:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 974fa5bed896880c0825751c005b1dc7 SHA-1: 0457840f5dc1656d069d9bcbb0181b5bb86df65d SHA-256: 485792f239c616fa91d10704800494a66f4280968245dff23a51f74e3443585b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting it's designed to redirect users to potentially harmful destinations. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/5a9712fa4038fd47d06e481e733bc69a/kijapobodowowazozewid.pdf
    • http://erpsamik.com/ckfinder/userfiles/files/mipojofuze.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2411b4de98f61e2ba0a8122ee538e89c/95851877021.pdf
    • http://acecaalcoy.com/userfiles/file/makoderejotelafugel.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/13428848093.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae272faa0---18083942933.pdf
    • http://medicare-darmstadt.de/bilder/UserImages/file/pinazerukowenirujugex.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/nd3v2gvfu73jgua7hugmrdatvd/76599947625.pdf
    • http://eltonltd.ru/sites/default/files/uploads/domozutojakezadajixi.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/avif7u5i71uf957s3ko3vcbntl/sakujaveb.pdf
    • http://staractivecollection.com/resimler/site/files/xejumufinewofufiwesanidu.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/e981c6b51ccfe0bf4ee1189ce77dc086/nasozemo.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a39c700ec4---80127246781.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3af0d6ec7ca3317f8173e95cd34c1103/lulijenimekufitalubuzo.pdf
    • http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/tirunagizawenuferuv.pdf
    • https://yingzhaoliuart.com/upload/file/bolivun.pdf
    • http://bogaarchitetti.it/userfiles/files/naxugo.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607371934656f---43014064969.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a48aa316a6b---96988313620.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nfu8fee1a027r3fkgngqm9e440/xozika.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/07a5d0bcb5c68b06d25423fff6bf423c/72602904139.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/895e0e5da34bb4ded0244f43b170684f/fiwodanilawerutori.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf3471acd---buwuboxedovowakedonif.pdf
    • https://nezrenpin.com/calisma2/files/uploads/3499384101.pdf
    • http://newdimension.su/userfiles/file/31976841469.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607b000e8dd11---11347718943.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=what+are+the+5+senses+of+imagery
    • 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_off0000ec2d.bin
f46320735b9924183e29da3f99af9752f965a15504ca9a7cb179eeca7ebf061c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 16724 bytes
font_01_sfnt_off000117d8.bin
7bbbef2a748513214dd514119755043cca9b4ad807ffee14435829bea2103c50
pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 10856 bytes
font_02_sfnt_off000130d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D8 16792 bytes