PDF malware analysis — malicious · 9d0442e02abfb0b6

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 19:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: ba4dad6b00883ccbba7a078ebefd563c SHA-1: 025a3f9181f3dafa549a61447356ce64d32e7a01 SHA-256: 9d0442e02abfb0b69a9f7e151838e56d20f8b3c7b9f96620809bff87dfcdfaed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

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 http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91301bdd54---wotuzikekenudobijibexejaf.pdf In PDF document text
- http://bakoca.hu/files/file/feramitaf.pdfIn PDF document text
- http://pierrevillers.fr/mairie_files/file/kuxezilozifogoronawako.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c605bd4bc---vasumulovugipis.pdfIn PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/54cb94342224ab36504f1ebfc9ee13bd/7316808303.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da09879b0c---38636770451.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b23fa2932ef---rivapoxibuni.pdfIn PDF document text
- http://adance0112.com/upfile/editor/file/nawamubigeboxufidil.pdfIn PDF document text
- http://safeabortionnepal.com/userfiles/file/zajupedotorakok.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a44d9348f---jozubuj.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a1bc629e07994c988110ec9e3587cb3c/10429089668.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/xurekubatipisedolebul.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607679d367e2d---74534115855.pdfIn PDF document text
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/a6dn8caht1tb6etj6kmj73nmt0/8144987766.pdfIn PDF document text
- http://spc1991.com/ckfinder/userfiles/files/zarofobevuzekivez.pdfIn PDF document text
- http://reicar.dk/userfiles/file/wobuluvuj.pdfIn PDF document text
- http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/9587636828.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f966a4e427---fivudaxopakebifimukezozux.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/ef59c5b5e98fdbd21058c9f3ec75f2f5/pawoxezujizudejaposurid.pdfIn PDF document text
- https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/r0jo9r6ki0hq2qt4bri9hm89nr/11845175766.pdfIn PDF document text
- https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/00ef6c39a15c65f4ae56a660a7fd5e9e/51573821005.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/24e03e79cb029b8c974de4980f3e5869/melarugutup.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5b0e6e98e1b5f6a89354eb38ff89047f/77861144693.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/f71438d7e21305aaeaeac7a52318f2e5/xemovurujunuwosedakefuvex.pdfIn PDF document text
- http://palyavalaszto.hu/teszt/upload/file/93276760979.pdfIn PDF document text
- http://babamoleskine.com/files/file/40256229835.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=focus+group+question+guidePDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE3C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001064e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1064E	16600 bytes
SHA-256: `78ab346dd8e5fcca087b88191049e4f2f72de285c54ff664c521fb03ed9781ab`
`font_02_sfnt_off00013132.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13132	10704 bytes
SHA-256: `06604d7b63a43577d1cf8a829e08eb9c7aca4356eab08f7ae0cbbaa6cc06c6bf`

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