PDF malware analysis — malicious · f4e8f0ded5e28028

MALICIOUS

PDF

85.4 KB Created: 2021-08-14 00:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 0d4e343a8e4d4c7093a1f8a35cc69db8 SHA-1: 0562717d30842206ec17dddf7a09864e3751c594 SHA-256: f4e8f0ded5e280285cc5d864191976eae7fce18b945dd7de865220c980a13a32

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or conduct phishing. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics reinforces this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

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://altelaw.com/uploads/image/file/teremeze.pdf In PDF document text
- http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xijejiwi.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2aeeba7cc---14746019481.pdfIn PDF document text
- http://turar-mussin.com/userfiles/File/zirowoteselonugiritod.pdfIn PDF document text
- http://divapharma.com/uploaded/file/lajosazotujedeponufutuzim.pdfIn PDF document text
- https://hkparkkonutlari.com/image/files/gibedapatowajigotobifabun.pdfIn PDF document text
- https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l6j2seoh9lkjorgef6s1qf5tne/titexazijekowi.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609712b48c37e---duzedemuvowukoxukofitupe.pdfIn PDF document text
- http://davidhammerstein.org/userfiles/file/21818017975.pdfIn PDF document text
- https://blsautomation.com/ckfinder/userfiles/files/loxam.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/5dql20rmaf6fufqu1uc5qil0k7/guzokemogodudimibofojifu.pdfIn PDF document text
- https://evrenmentese.com/upload/ckfinder/files/14565138201.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074273be1a1b---29412036700.pdfIn PDF document text
- https://oversaslogistica.it/file/gijopile.pdfIn PDF document text
- https://vienhung.com/webroot/img/files/tonuvix.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/b1c821074c1f90f6d0f337afe746c0cd/nodasimawajefo.pdfIn PDF document text
- http://www.asslar.de/downloads/balodufum.pdfIn PDF document text
- https://cafepiolho.com/uploads/assets/78240509146.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d855d2a85df3bd5bca799f70960f876f/lojupizipipek.pdfIn PDF document text
- https://ecoretras.com/file/71949228296.pdfIn PDF document text
- https://ofertaromania.ro/ckfinder/userfiles/files/67957026717.pdfIn PDF document text
- http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc6468f68a---jorizafuxufegexuzuji.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/906797ed23dc17f94a3696a14705e23a/83112194870.pdfIn PDF document text
- https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c881257973---zovulatimawinorubawi.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c38d6e9a905---sativuvasogujitesefilugu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=musica+de+los+temerarios+mp3+para+descargar+gratisPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cebe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEBE	11020 bytes
SHA-256: `4c060289b619e7af612ea34a3b8c0f74410813789c2ee03ab49639a1914f9d07`
`font_01_sfnt_off0000e82f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE82F	16944 bytes
SHA-256: `ef0329dac4803480f2d6f4d9e9c4ba3aed2817dbf0857a17f9b8becfccd91a33`
`font_02_sfnt_off0000ff7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF7D	17612 bytes
SHA-256: `e5ddfa0e7e518d15e7346031adb15fc7374078c1cfd48b22aacbe56862b73548`
`font_03_sfnt_off00012c23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C23	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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