PDF malware analysis — malicious · 918d2c25b740c9a7

MALICIOUS

PDF

77.1 KB Created: 2021-08-21 15:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: f758ad62e57446a9300afd2728020a7c SHA-1: 1a5b0a085e054afeade3cb9faad51e612f6c7b9f SHA-256: 918d2c25b740c9a79da81e610870d3a0a3dd3b9fc4dcf710a3603fe557275f6d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://madeirashopping.com/userfiles/file/bibawuvitikopiritila.pdf In PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610490930a0ce---rapomo.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a60b704f3ca---70464196095.pdfIn PDF document text
- http://apexibd.com/uploads/fck_uploads/file/1230501628.pdfIn PDF document text
- https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088fc0d9e5a0---36364513281.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078cca6dd7ca---pewokibu.pdfIn PDF document text
- http://d4svancouver.com/clients/c/c8/c8601140a4283eb9b700f388a83987a3/File/65595880226.pdfIn PDF document text
- http://abwmercury.com/uploads/files/lijanufilikotatop.pdfIn PDF document text
- https://majubesar.info/contents//files/39006222509.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/peolvd5qlefrqcai05amnq57k4/dofexewomenurufiwo.pdfIn PDF document text
- https://resulgame.com/calisma2/files/uploads/giduzigijoja.pdfIn PDF document text
- http://garageanything.com/js/upload/files/33710907733.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/c30tenu4saq3r3hp5h80vdjini/49996900073.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dea7bc478---77296903456.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e11c9bca1f724265304253851ac0354b/kovuvolog.pdfIn PDF document text
- https://signika.pl/Upload/file/76343935581.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16c9120404---490033384.pdfIn PDF document text
- http://ilkyoukais.com/Images/Media/files/febatevosipukan.pdfIn PDF document text
- https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/8052adafbaa4ac2d441b412891fb1950/zubofonoxafotixosatir.pdfIn PDF document text
- https://bodegoncriollo.com/userfiles/file/2105679018.pdfIn PDF document text
- http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/83871854969.pdfIn PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e5093b500cdc7349e336c445bb19124f/xewixab.pdfIn PDF document text
- https://damsindia.org/admin/uploads/file/puwumapemagedutubuxusoj.pdfIn PDF document text
- http://okmarin.ru/userfiles/file/31375717832.pdfIn PDF document text
- http://bartuceviri.com/userfiles/file/56068381181.pdfIn PDF document text
- https://agrilaui.com/userfiles/file/92993059186.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=mr+autofire+promo+code+may+2021PDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c558.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC558	17428 bytes
SHA-256: `d2053f7a85317ab6b8899389eb45b4558287d944a184862546adf7225b9e46a5`
`font_01_sfnt_off0000f365.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF365	10964 bytes
SHA-256: `79140b3d5ec3af018e14885f873ea1227c126b86d5e1c8e350da72da7da04ca9`
`font_02_sfnt_off00010cfe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CFE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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