PDF malware analysis — malicious · edc49970f85294bf

MALICIOUS

PDF

95.9 KB Created: 2021-06-30 10:37:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 18ffe50b131a9ddc5f4d421f9d212ab1 SHA-1: c949ad7fb9c244b19d15ea2f7c8e43ea89498890 SHA-256: edc49970f85294bfa408c0a2b6decd69145e6bfad74eb6fc23630abd1c97f2f9

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on compromised or disposable domains, suggests a link farm designed to redirect users to malicious content. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea that the document is designed to trick users into downloading something harmful.

Machine Learning

Nyx PDF Classifier malicious score 0.9918

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://catamma.ru/uplcv?utm_term=state+of+decay+2+pc+torrent PDF link annotation
- http://technology-mp.it/userfiles/files/bomixigilazepem.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609479797cf8d---69262295568.pdfIn PDF document text
- https://victorybear-info.com/userfiles/files/vamot.pdfIn PDF document text
- http://koovappadyscb.com/ckfinder/userfiles/files/zoginusogixof.pdfIn PDF document text
- https://mtmnetwork.net/uploadEditor/files/69046452205.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071936571255---88813474821.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090b35aab36e---3728241998.pdfIn PDF document text
- http://iproperty.ae/userfiles/file/13866612387.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/nevovukekepevesanivupu.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/de03ac71856c3e555fb895bf23b19630/kewizotebazunatozajas.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/xixevazozelanegutib.pdfIn PDF document text
- https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/6pvut60ipdhsd8e8rbmja41ic0/11045355155.pdfIn PDF document text
- http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/cc276d8fced568e4e8a26c0095f570ce/leruwavovopusesela.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c67bdb76e---1701246871.pdfIn PDF document text
- https://menu2uplus.com/images/file/64671651991.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9288a6c72---11106307208.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a22ee5bda---manojoxewipu.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79315743b---rutonilibububolijetapeb.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2c4e732308785ec8e6fd7bea121a7ed8/tavagajozivakewaworobom.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/28e0affd63d083efc1fd78cfca6bcb7b/93372299132.pdfIn PDF document text
- http://ac-kenigsberg.ru/files/file/joziminuz.pdfIn PDF document text
- https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ohnpb9njt8nl8blpuc1iglqrtn/logekafesamalape.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/7eobeo7p9dd66n82g11tr2vung/kelenalinuvuvadatiredame.pdfIn PDF document text
- http://chayka-svg.ru/files/3055928435.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_off0000f4ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4EA	10616 bytes
SHA-256: `b580ee6773b6929bed80f48b3afe29596742b44c0a9bcad08b16bb312eeded8e`
`font_01_sfnt_off00010d67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D67	16144 bytes
SHA-256: `fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516`
`font_02_sfnt_off000122e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x122E6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013af8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AF8	21560 bytes
SHA-256: `1ac378b5ca2690c66cec859da59cf711b4a5934a73b52a0bc3ee9a6f267c3494`

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