PDF malware analysis — malicious · b754fcc7ffe46cac

MALICIOUS

PDF

87.1 KB Created: 2021-09-08 04:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 0ef0947ae3411654574a3320f207fc69 SHA-1: 8c20d5ad99dd3c6bf378762691babaac596055e0 SHA-256: b754fcc7ffe46cac748af5ab7080550a638d96be79f9a33d14b45e18791da67e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing or malware distribution lure. No scripts were extracted, but the extensive use of external links points to a phishing or redirection attack.

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 https://oniceh.ru/uplcv?utm_term=asco+guidelines+breast+cancer+2018+pdf PDF link annotation
- http://aaaexpressheating.com/userfiles/file/sizofarimutori.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/26842294815.pdfIn PDF document text
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/faa635fd8701d49ecf3ce49ccab81530/95523308766.pdfIn PDF document text
- http://dentalclinicbangalore.com/uploads/kikadifopamupudif.pdfIn PDF document text
- http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gpamdpal97564katqc4avv7mo3/mabaxagetozapur.pdfIn PDF document text
- http://occahomesearch.com/userfiles/files/jereb.pdfIn PDF document text
- http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af948aaf31c---84093667242.pdfIn PDF document text
- https://cgeminfos.ma/upload/file/86322057235.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e618e67a043---nipotofezugepifuvofasuva.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3f9e80306c36612443fb9617032dc329/ragawizikinafufilal.pdfIn PDF document text
- https://businessservicesuk.com/userfiles/file/70946754304.pdfIn PDF document text
- http://travelshops.pl/userfiles/file/78528595410.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4dd7296d2---vugikeni.pdfIn PDF document text
- http://chandigarhdatarecovery.com/files/file/50311020012.pdfIn PDF document text
- https://stijsr.com/userfiles/file/fidepis.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/al43vo6j744lbtp5ahvtdjl737/76828519252.pdfIn PDF document text
- http://russkiivopros.com/images/FCKeditor/file/zidofokezozorike.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/550dc42235f07397e7d09e91416b5cb6/nomederupeto.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/93115808450.pdfIn PDF document text
- https://akonis.ch/userfiles/files/fusojugat.pdfIn PDF document text
- http://ventexevent.se/uploads/file/kufufuvoto.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071521eb9534---leritezagurijosovinarolux.pdfIn PDF document text
- https://medgal.pl/admin/ckfinder/userfiles/files/dazalumirugowewis.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612707d832cf2---riratilapexaxivetagupi.pdfIn PDF document text
- http://wangyiphk.com/userfiles/79448056953.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_off0000ef54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF54	17044 bytes
SHA-256: `6e85d3592a8b0c03a8b84778accf52cb32c6f4587b84f97d0954b19d1528a6ed`
`font_01_sfnt_off00011b41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B41	11516 bytes
SHA-256: `f92b42c68c2f735d6cf9ca2c3e3eaaf0091578473469face38df1becdb1ef71f`
`font_02_sfnt_off0001365c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1365C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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