PDF malware analysis — malicious · 69caf79491e28407

MALICIOUS

PDF

85.9 KB Created: 2021-07-08 08:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: ce41c8037283369f858164de05d15970 SHA-1: ae84a4727932b94e6a8eb6972fd6e121f30b7e6c SHA-256: 69caf79491e284071b9c4e4521cc1737351799d1a7b2fdb07b9d496ae839f9a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, such as smidgel.ru and purefeeling8.com. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://smidgel.ru/uplcv?utm_term=eyes+always+dry+and+tired PDF link annotation
- https://purefeeling8.com/data/file/28484850370.pdfIn PDF document text
- http://bundoreh.com/fckeditor/files/file/6829891506.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160859f8d94e0b---80481005627.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e60f8774a---nudetiterenajuwoxatuwe.pdfIn PDF document text
- http://abwingsva.com/uploads/files/dakofi.pdfIn PDF document text
- http://blatt-gruen.ch/files/80772069695.pdfIn PDF document text
- https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/hkn2d0ircdfmcdicm36riuki39/pabod.pdfIn PDF document text
- http://didocrosby.com/imagenes/file/3440807544.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070edd6c8acb---sibujefesiwe.pdfIn PDF document text
- http://solartgaleria.hu/images/file/nuvovewoweropiremuwuto.pdfIn PDF document text
- http://chongros.com/userData/board/file/20832155422.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/3l8uppgu4748va8q5buc6kmgkc/bebetiziwasumixurabiduper.pdfIn PDF document text
- http://susasoft.com/upload/userfiles/files/gututewakinefikedize.pdfIn PDF document text
- https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d32d260d5d39157f1fba56b24c12dfb6/zikagotawenizebi.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/83ce429a6909a8dbab1c12689298a334/zusev.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5ae750485ab04ed1dd6569b8e9236111/tudeta.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a0ac9eb1---dowenixekud.pdfIn PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/66246512ef465a575f9539282b48257e/wopejeribufumogo.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/bf8586124edcc4bd13087abdd9ff148a/tegijipovik.pdfIn PDF document text
- https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/7cba04b207bbb80f75a500dd86bacae8/linoxukufuxe.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/181dc8c863ac28ad9db1c157f83b412d/76989270735.pdfIn PDF document text
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cca09f6bf84---4145055163.pdfIn PDF document text
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16082b792cf804---84975002666.pdfIn PDF document text
- https://anfauglir.com/images/file/zijofamubigi.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a67c68c35---37265424032.pdfIn PDF document text
- http://work4shop.cz/userfiles/file/xabugovekawuvoge.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_off0000ed53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED53	17400 bytes
SHA-256: `6117c35ed8fccedcfb670dde1e2a497bf82d686cb243ceae0e0d298c7913f457`
`font_01_sfnt_off00011b14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B14	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001332b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1332B	10304 bytes
SHA-256: `f3837ee7ffe65d00684e8da8a23bd861558b9ee8936ed1e3f6b2936ab17203ee`

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