PDF malware analysis — malicious · f12c3044708a6524

MALICIOUS

PDF

74.1 KB Created: 2021-09-07 00:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 08f12057e942fce018abc1ae351533a8 SHA-1: f921d6c37bac1856a186a4028bed0b7812817f01 SHA-256: f12c3044708a65246d783d5b5c94fc556fbc14f816c4e9b3d650957b2be1a5f9

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of urgency language further supports a phishing or scamming intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://crysiq.ru/uplcv?utm_term=rosenbaum+pocket+vision+screener+pdf PDF link annotation
- http://ifaistos.reality.gr/~triantaf/images/file/90276635674.pdfIn PDF document text
- http://escuelasfutbol8.com/docs/files/luxige.pdfIn PDF document text
- http://xn--80aesyq.xn--p1acf/files/file/83741450127.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070551ef1c87---nozokaworagotud.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/53305304d6787de70f2341407e55c358/79864845427.pdfIn PDF document text
- https://relaxbotanika.cz/ckfinder/userfiles/files/71978846068.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e21fd5ef4---54440753863.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b01c8751eadf7cff36e810a26ac6bb43/kogojemekowuxukoker.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b856f1ca99---kigizezani.pdfIn PDF document text
- http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/wiruxovujiwetaxaroz.pdfIn PDF document text
- https://lesfeesdelhetre.fr/upload/files/xawinijifedobegon.pdfIn PDF document text
- http://sun-tes.ru/files/file/87163988071.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16132c3e3546f8---79556542996.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16116b70c01c75---39855546639.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e64eb870cbd1a67334d0486a15f79673/98241575276.pdfIn PDF document text
- http://asbufestival.com/uploads/FCK_files/file/311514880.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98683fe0d---8600813329.pdfIn PDF document text
- https://uclerbaklava.com/resources/file/zanokimajokabinekaz.pdfIn PDF document text
- http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160838a2706981---90677417474.pdfIn PDF document text
- http://maroba-zirndorf.de/file/gamusifilakeposetapumasap.pdfIn PDF document text
- https://sentinels.ro/userfiles/file/gewekelonatetivoxepabe.pdfIn PDF document text
- https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7a53d5fb7b32bb385f87eff6042e7a8b/32984455775.pdfIn PDF document text
- http://93564497.com/userfiles/94869241205.pdfIn PDF document text
- https://aimara-bg.com/userfiles/file/7835954409.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_off0000bb0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBB0D	17356 bytes
SHA-256: `d6bb56665957061c6991c3b3fe6ee056df4eb87b926e530679fd26c43a24dd71`
`font_01_sfnt_off0000e8da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8DA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000100f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100F1	11180 bytes
SHA-256: `c51bfab0cf61462c29110dcf34bf07188a0df47f6805c7fb82c5eb79b1c5f563`

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