PDF malware analysis — malicious · 565900398f3c742b

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 06:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 93d210c17b6a56def1bc1f992336bfa1 SHA-1: 3203c084d40a4785b0de25104c92a67955be4aa3 SHA-256: 565900398f3c742bb5aaa25fc60cda8c0c71ffbab68aa5036bb0778bc5bc87a0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16107972ce1310---68125292263.pdf In PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/81590dc54137496c9685ef587774aef9/wozesivudewami.pdfIn PDF document text
- https://toromecanicorodeo.com/files/kikiliveduta.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/v596i456f205e408lt55d0fvsl/muzixu.pdfIn PDF document text
- http://probeg2000.ru/files/userfiles/files/mozisipebinaliburosana.pdfIn PDF document text
- https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/fd864aae4f61cf859814008e2db5b018/18818482057.pdfIn PDF document text
- http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/wakomavazopusavodasuko.pdfIn PDF document text
- http://coreaad.com/DreamDataUpload/file/54024299381.pdfIn PDF document text
- https://deltagroup.bg/uploads/file/48139532736.pdfIn PDF document text
- https://istocdukkan.com/userfiles/files/xulupimapobozu.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lkc0f6brli8fln0308s8rpv6h6/wivodakovozajakejenuwux.pdfIn PDF document text
- http://mlsy.cz/images/file/files/mapekurirapikitizos.pdfIn PDF document text
- https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e76afbf502aecf24df61a634c4e9538b/76088925760.pdfIn PDF document text
- http://coral-travel66.ru/admin/ckfinder/userfiles/files/50718468562.pdfIn PDF document text
- https://hsse.cl/files/voginodutomisog.pdfIn PDF document text
- https://nusamulticentralestari.com/Uploads/userfiles/files/48356545304.pdfIn PDF document text
- http://radis-rrl.ru/userfiles/image/79985964867.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=worksheet+of+verbs+for+class+5PDF 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_off0000e210.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE210	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fa27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA27	10660 bytes
SHA-256: `bbcfe9210ca0b31a5e4fd49499ecd547c8a61beb0a4947ec5a62c5f81b44750c`
`font_02_sfnt_off000112e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112E1	18388 bytes
SHA-256: `f8ea38dceb4320beda3bb4ccd2ffe5b1de24803f5fa191dfe3947d090a998b04`

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