PDF malware analysis — malicious · a074a6777621c490

MALICIOUS

PDF

70.1 KB Created: 2021-10-03 14:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: c4bd41aee28fb4f1e049286773f46346 SHA-1: 8f7056f2b0ba473d4200a18a8bb3cc7b210f2baf SHA-256: a074a6777621c490a1d7bfe3c7fcc20a6069651277c993721d796c7680100e63

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and links to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. ClamAV detected this as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious, supporting a phishing or malware distribution attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://inwebjor.ru/uplcv?utm_term=tide+times+rossnowlagh PDF link annotation
- http://juditphotography.com/picture/userfiles/file/vejipisedalagejepa.pdfIn PDF document text
- http://gazosilikatnn.ru/uploads/files/41533185852.pdfIn PDF document text
- http://sweet-sugar.de/images/uploadedimages/file/57526709524.pdfIn PDF document text
- https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/fkvvq7h7o2n184rlqdf2t42d8b/davapizurimagusajonoxoxis.pdfIn PDF document text
- http://daivupaint.com/img-chamthi/files/zojigiruxedoj.pdfIn PDF document text
- http://dom-2000.ru/ckfinder/userfiles/files/gofasenidi.pdfIn PDF document text
- https://alnahamgroup.com/userfiles/file/deziro.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/d619805254b1ba8372d4b460eca24a23/kubosiv.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/nj1lenu0q6gsis13u1dqbaomq0/37008136489.pdfIn PDF document text
- http://studiophotosfashion.it/userfiles/files/60743001353.pdfIn PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7a16547c1---momezawoxavopolod.pdfIn PDF document text
- http://shendaoguoji.com/data/attachment/file/54960361313.pdfIn PDF document text
- http://boatmonies.com/uploads/files/konedixulagijimosu.pdfIn PDF document text
- http://klimatyzacjaradom.pl/userfiles/file/begaluzarazepidej.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ddae2b749---jodogofirus.pdfIn PDF document text
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3abebfb8ed6a5276061ae3b68a78ee3b/bujotuxemikorupunixisuge.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614048752dad3---mitofiminif.pdfIn PDF document text
- http://zonazero.es/userfiles/file/ketujozakedunuvagiwuzad.pdfIn PDF document text
- https://888nv.ru/userfiles/file/52634738352.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16140ec33b7e22---38418330215.pdfIn PDF document text
- http://joyandwowbook.com/upload/file/begevilerakiwovaz.pdfIn PDF document text
- http://mylodge-naoshima.com/subudozisa.pdfIn PDF document text
- https://makojudo.pl/zdjecia/fck/file/1284013326.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/4b47223028b98a5898c93ffe0fba6842/kivibikojada.pdfIn PDF document text
- https://magatek.com/documents/file/disofaxeliri.pdfIn PDF document text
- http://e1pl2.nazwa.pl/busy/fotki/file/71286412998.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b2d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2D1	15568 bytes
SHA-256: `34b540c588f855940de741d337d7fb457251cf268ab4f4794407e5b14364d2bd`
`font_01_sfnt_off0000da66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA66	10744 bytes
SHA-256: `80ae461c604cf1849070824a7f76a4927f35e447affac23821d5b520ee91ce31`
`font_02_sfnt_off0000f2bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2BC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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