PDF malware analysis — malicious · 64ea4b2db75b8062

MALICIOUS

PDF

98.1 KB Created: 2021-06-29 02:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 336afe37cc58b37a49df67f6fedc1428 SHA-1: 51c5410345c7b319ca4788beeadb84ebdf651fe3 SHA-256: 64ea4b2db75b8062c728cb394e0d8076a9c02174a45605a0e5f97b11e3d02548

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. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of external URIs and the overall heuristic profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9704

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://infrive.ru/uplcv?utm_term=as+it+was+in+the+days+of+sodom+and+gomorrah+kjv PDF link annotation
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/igpgs995c0k0fqo6u3fb982r3o/tamurelaz.pdfIn PDF document text
- http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/19742509052.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6185b72c---wunomojekalupazonenazogi.pdfIn PDF document text
- https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/65940965836ebea640359b0179d81617/5903326192.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a91205e9ab6---12431311991.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/45426a12db1373b1b4f95b1e21808342/xufutubulowez.pdfIn PDF document text
- http://sola-brothers.com/userfiles/file/47822946172.pdfIn PDF document text
- http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/90128022184.pdfIn PDF document text
- http://4grd.com/cmsimages/file/31869773343.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/81a990521a7434f7b86642df64f649a1/53453286883.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/hcdaklvu7lol9pk0ntnl1i62m6/rabimuwaxixawanav.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f231a7824---ponotezil.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1f8b6a53ef21ea39dc6c2b2ec3f94a25/sibilukerejova.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771c83d16b7---kunukefojuletejojuwojoda.pdfIn PDF document text
- http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/jagelitulizobi.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077665cb050c---xoguguxawaposedate.pdfIn PDF document text
- https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/s2u8l3ls3v25m3co1brjbe17kf/65911068712.pdfIn PDF document text
- http://deauville.ru/files/file/regikowekenowedixodut.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/6065d1a58e42e9bf95d9b07f8a4320ef/22089359885.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ade674e1602---81205301887.pdfIn PDF document text
- https://ceccarbotosani.ro/userfiles/file/sekafarotekazago.pdfIn PDF document text
- https://topupdana.com/contents//files/vewugalenejo.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bg4a6ocjtg6gem402tq5isgesc/boxub.pdfIn PDF document text
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/s06auv2soepl3tl3ftv5qam7mj/54597273943.pdfIn PDF document text
- https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/da94e0af582ae0479336c98f844e949a/4402668790.pdfIn PDF document text
- http://marinda.ru/pics/images/file/8161527422.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000106f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106F6	16768 bytes
SHA-256: `18d0e93b41b8d995426ac873855a6b573536673a75a93a73d7396e5d657ef026`
`font_01_sfnt_off00013240.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13240	16232 bytes
SHA-256: `af293b2b60dc5e826b00d8953dd18f37a59bdd939ad7d7593537948814e7f124`
`font_02_sfnt_off00014801.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14801	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00016018.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16018	11224 bytes
SHA-256: `bb1bb4df045553fb260819a334d05702c2cfcd595ae63adca14b1c792aeccbb1`

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