PDF malware analysis — malicious · 5f5760b3c4b28a47

MALICIOUS

PDF

77.9 KB Created: 2021-09-01 21:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: faf81a3c582002fade3e1e41ce7cb100 SHA-1: c758027b63a081f8f22555a05f375d528f65817e SHA-256: 5f5760b3c4b28a47b9380d5b85384b36a202513747f6575ccb0c5021fabfd9f0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users to malicious destinations, either for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://crysiq.ru/uplcv?utm_term=agora+opening+hours PDF link annotation
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873b21d0efb---xepefovibojivovivomo.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd154922a8---35713330492.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dl9lv2oesk2m6frf0tqhp3uv0d/24304204128.pdfIn PDF document text
- http://sanruou.com/app/webroot/uploads/files/57550477193.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4b9ed4227---63551717364.pdfIn PDF document text
- http://fueandhair.com/userfiles/files/fulenepimivorubelovudub.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/8051753889.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/6fa290b7cfbb842c1c6a8b5cbb71c9d9/68954309939.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b58a0e5be9---kinasufe.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/0oqktiukdgpkkvhd87gp256ud2/4386979813.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b74183239706a27dccf999641ebb3d06/baleraxukudi.pdfIn PDF document text
- https://oncallanatomist.com/ckfinder/userfiles/files/foxikefofujuwibafawen.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c77707d9d42---merobemezolopog.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0ccebf415dfe4e647e13b9a1030fdde7/fikorafejiwimum.pdfIn PDF document text
- http://kapelski.pl/userfiles/file/94507515527.pdfIn PDF document text
- http://onishi-kyosendo.jp/archive/58407571207.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094574d50389---pixukefu.pdfIn PDF document text
- http://cortabellanews.com/userimages/5385416694.pdfIn PDF document text
- https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/dc8c4eff4d7e95d6a6e36a4d9e138799/dajesadugegikebakalaku.pdfIn PDF document text
- http://cw-cut.com/uploads/file/98061108768.pdfIn PDF document text
- https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/88d48353c68941dab6266ce9c71913b9/27229395438.pdfIn PDF document text
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160efe866d2bfe---jugowuva.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_off0000c8ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8AE	18560 bytes
SHA-256: `2972c1647f8bb312666779017d216ad478a248aa8581580b1fe3c2b85ba690ae`
`font_01_sfnt_off0000f8a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8A7	10468 bytes
SHA-256: `99a142c39566b390cbedde2492c3a46d7b03e69a3f9209a730bf4815d6323f02`
`font_02_sfnt_off00011057.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11057	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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