PDF malware analysis — malicious · e816c70ab8e138ef

MALICIOUS

PDF

88.2 KB Created: 2021-07-03 19:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 32de4a7cc02409c11ca77011bb68fa20 SHA-1: bb82762d6fad83f73a8efa42eec19a5c12f15571 SHA-256: e816c70ab8e138ef5b5daf87433ae871b276d797b231a53eb49f8edfd559e994

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of urgency lures further supports a phishing or social engineering attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=management+book+by+griffin+pdf PDF link annotation
- http://beastyenergy.com/userfiles/file/97313430654.pdfIn PDF document text
- http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddcc69238c---97772524846.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/1135f1fe58920175cfa6e4e68446148b/bukobuni.pdfIn PDF document text
- https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/73931f2d70fc1a5fbf828c750d41a5b2/50526758007.pdfIn PDF document text
- https://tedvandergulik.nl/userimages/file/kezadefu.pdfIn PDF document text
- https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/foki7r98c582moo40ht6mve6ol/3458734315.pdfIn PDF document text
- http://somsit.com/ckfinder/userfiles/files/33210227106.pdfIn PDF document text
- https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/f7215d7383f65ee967ba0e7958b23d25/33276589437.pdfIn PDF document text
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795072a0abe---39968313502.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/fpipivl5cnbvv8b40sfnsrvto7/xazalek.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/bha58o2qs22nm0qqgj88vbaqrp/xorira.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/532cec939ec96406f067657e67daa6dd/makutoz.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bbd04760---86846556315.pdfIn PDF document text
- http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074dbaff0d34---3289722091.pdfIn PDF document text
- https://dbmotorbrokers.com/userfiles/file/jemuxumoso.pdfIn PDF document text
- https://kisikana.hr/userfiles/file/gukuzoniwapuxasogolojoxa.pdfIn PDF document text
- https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cadf68c8de.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/37416627054.pdfIn PDF document text
- http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b99b8f3551---jujuz.pdfIn PDF document text
- https://fentesmakina.com/paket/upload/files/10777023468.pdfIn PDF document text
- https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/54eaae28feab3d63419c7684d825f4f9/10800765015.pdfIn PDF document text
- http://multifamilyfoundation.org/clients/3/38/38c33163524538bb895552046de0b362/File/dudozemonovomifa.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c6a99606---21346543167.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c07b29a45---1434178203.pdfIn PDF document text
- http://generaltubi.com/container/ckfiles/files/jisili.pdfIn PDF document text
- http://allamericannursing.com/userfiles/file/nerajet.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_off0000f670.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF670	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010e82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E82	16864 bytes
SHA-256: `74b6100732cd8eaef013bfe9739ba05aaad459b9442276c4d6b05453e1cd4f80`
`font_02_sfnt_off00013a91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A91	10968 bytes
SHA-256: `aead1bd8fad3805c9c8dac08fad18404fb3a37e360bbf155382bf37ba9b3d9c3`

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