PDF malware analysis — malicious · 324704620fa155d1

MALICIOUS

PDF

83.2 KB Created: 2021-06-30 08:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: 7d9871b96ef8b6918131e939cfefc6c6 SHA-1: 4ce697442e556d9c45724e3320c601d2c14d0f1a SHA-256: 324704620fa155d13440e94c2bdbf65bb38f60db582e3e77a320ce0072ec0e28

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the structure suggests it's intended to lure users to external sites.

Machine Learning

Nyx PDF Classifier clean score 0.2214

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://synerhu.ru/uplcv?utm_term=class+12+physical+education+chapter+2 PDF link annotation
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd83601d3---nalifo.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d139fe6d3408904e00b2d4a2c8c074d2/38612713859.pdfIn PDF document text
- http://alliusie.com/userfiles/file/64885617802.pdfIn PDF document text
- http://ckpak.com/fckeditor/userfiles/file/73529032803.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071deaac2d38---6947190592.pdfIn PDF document text
- https://ratsimae.eemedia/contents/file/zoxowuresu.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8e244acdc---jalapabebozekowemilol.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/9c2437ae3f399748ef9d2ec581b1d979/tisajetafox.pdfIn PDF document text
- http://ventilatoryzlin.cz/images/file/86525052985.pdfIn PDF document text
- http://buergerforum-tirol.at/file/furovugomozozitezob.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/3dc1fe01f938372b23b4121d44d39e52/koredatujematulizafuzivo.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160937d514a411---11446900030.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bcb58a6bc---buduzenetuburawod.pdfIn PDF document text
- http://imi.vc/upload/files/zonipigizategoko.pdfIn PDF document text
- https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/ebf6516221084bdfa08ffadd014160a7/jopefajewerubarerufopiki.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b460883e5a3---71708208425.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd13388a60---zuzuzut.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/514d577c278a5560d0ebcc8521fd7974/jolodovekukukolowevunuw.pdfIn PDF document text
- http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb8dd18335---wajigexeropukis.pdfIn PDF document text
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075463b9b71e---59496906669.pdfIn PDF document text
- https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/1k20v7bo78dseerd37mpkpcn1l/28622688480.pdfIn PDF document text
- http://0-50.ru/userfiles/file/nopipalavalinufonidamolij.pdfIn PDF document text
- https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/sebv50eic5fdsf2tdrqa9hb1m3/tanalusebujof.pdfIn PDF document text
- http://www.tramag.pl/upload/file/32758408098.pdfIn 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_off0000eeb4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEB4	11028 bytes
SHA-256: `f9af73c205a8ba53361ec07bb25e5ce595dc2707741b2ce54a520fafd0941597`
`font_01_sfnt_off0001086f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1086F	17328 bytes
SHA-256: `e907a54ea474f4ce34d6ed7d806f2a1ba63587622cec80e53ecd3a7638b12345`
`font_02_sfnt_off000135c0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135C0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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