PDF malware analysis — malicious · 6b0f5470b65ee5f7

MALICIOUS

PDF

103.4 KB Created: 2021-07-05 04:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 103a1aade17b1c1fd2b96361a371f3cf SHA-1: 48749ded0ca793d30fd5a9ef048974b8b83ef641 SHA-256: 6b0f5470b65ee5f77a13a45d00c5a629607c7de34318aaec42f6f5fca833bada

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous URLs, including those hosted on compromised WordPress installations, points towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9887

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://ewdel.cz/ckfinder/userfiles/files/ludikimobixixanoxus.pdf In PDF document text
- http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/1bmftl71bsduhmebjgk6tg73ob/ramixoluvilegerujenepaf.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f963e9c9f1f6f0c603bd1e95833f6184/kibol.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/8ab9836aaf8ccea19a2138d112d551c3/lotetepuletijakiju.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c908def28dd---97895050007.pdfIn PDF document text
- http://zoltysnieg.pl/pliki_wyswig/files/87526698611.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b08f2c94a---40104413672.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e031f201---81091524473.pdfIn PDF document text
- http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d50feaee8---41911091868.pdfIn PDF document text
- https://harom.ro/files/file/60113753694.pdfIn PDF document text
- https://roweryelectra.eu/app/webroot/uploads/file/16229766621856.pdfIn PDF document text
- https://mimpishio1bet.net/contents//files/wuvurazonukes.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16085bf6ee0489---tujewo.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/bbd239d48d07dc00a01c3b51991995d1/3209470258.pdfIn PDF document text
- https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/90901895584.pdfIn PDF document text
- http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2efe51385f---nawoxejamaba.pdfIn PDF document text
- https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/5ea7f294345121db97e96e3ee7e44bac/81143856216.pdfIn PDF document text
- https://amrapalispot.com/userfiles/file/55013520276.pdfIn PDF document text
- http://www.huntsvillepr.com/files/files/10367197082.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b62ce66e6eb---58837111346.pdfIn PDF document text
- http://abc-tel.ru/data/File/91977892546.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/cf8d942688fb2b59b84ff094c29740a9/96693852935.pdfIn PDF document text
- https://fizjolech.pl/userfiles/file/79350729172.pdfIn PDF document text
- https://afayl.com/userfiles/file/bopupuwaropulega.pdfIn PDF document text
- http://watthaistuttgart.de/userfiles/file/wisurem.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=abbyy+converter+pdf+to+wordPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE7E	10532 bytes
SHA-256: `532154914dafd0c7d7d3de826364448f40cd09c07aa6bc04dcca66bf9651c1cd`
`font_01_sfnt_off0001067f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1067F	17568 bytes
SHA-256: `60e6c7287a8f2f39f336ca17bdd3406af5caa0f013a19b504d62de416a74d7eb`
`font_02_sfnt_off00013450.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13450	24532 bytes
SHA-256: `a30db8b6776342e971dd3732c57d5577fc3428a4f5852d3180a54155a43b3c64`
`font_03_sfnt_off00017771.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17771	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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