PDF malware analysis — malicious · fc9823906960d1fe

MALICIOUS

PDF

86.3 KB Created: 2021-09-06 21:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: daa7ef350b830350bb74e80813e5cbc1 SHA-1: 1dcdb8ed88429ffaa090c4ef8009b9a10b675cbe SHA-256: fc9823906960d1fe5ca6325f06d1e31c0322d087ec3267317d259b8bfcfc797c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/ouolabrrn97gleivjf10c2runp/93329377613.pdf In PDF document text
- https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608528b973480---21906672899.pdfIn PDF document text
- http://appletechsolutions.com/userfiles/file/46822799968.pdfIn PDF document text
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda2f77945---rajegag.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36085594b1---2858955820.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16100dba7939a2---kilexatijufovutit.pdfIn PDF document text
- https://hohsingfiber.com/ufiles/files/turekadesobifonegunureduv.pdfIn PDF document text
- http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a55e2da1859---17500900882.pdfIn PDF document text
- http://bjaimama.com/data/upload/2021/08/file/202108121223564310.pdfIn PDF document text
- http://topspeed4wd.com/ckfinder/userfiles/files/58714995256.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec4c28d614---ruselaxi.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/7j40a9n5ri1qmnp7mc4b6och1i/loredogusuwakexusibagewap.pdfIn PDF document text
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vrsj0t0hgbabr44qt345hkcsft/wivoveletedeko.pdfIn PDF document text
- http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/61479270397.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f925b1e1f---vokuderudafepakelasixip.pdfIn PDF document text
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/55o7089966es59ldgele9t7tj7/50589401873.pdfIn PDF document text
- https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/a3710b023bf6b4f2d152633fa6727e16/begukimadavoleku.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/60816d59d5e0d391321c13e7a85a72d3/80122295146.pdfIn PDF document text
- https://szud94.hu/img/sajatfile/files/45356148169.pdfIn PDF document text
- http://greatnice.club/updatefiles/file/pibanazawezipuwurak.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f23e3a2126---nirunukolugugalitevekar.pdfIn PDF document text
- http://hjtech.org/admin/upfile/file/lavufuwumumugetuj.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a158827fad5---79924935236.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f94f5a4e024---pipesikixovise.pdfIn PDF document text
- http://cleangroupbd.com/ck/upload/files/pikezowonujaj.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=cuisinart+dlc-10sy+manualPDF 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_off0000e910.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE910	10732 bytes
SHA-256: `62cfd775724c2c54d5b343f7b2e7bde23f5e31be8b356859e58a6eb29433d3ec`
`font_01_sfnt_off000101de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101DE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000119f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119F0	18400 bytes
SHA-256: `1ceb8b0335ae3f6a51485d9d1918c06943cb9ab9c8acacb4cf7ae5c419582768`

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