PDF malware analysis — malicious · 85200a6a4c9c10ca

MALICIOUS

PDF

77.0 KB Created: 2021-09-01 01:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 04f0a62b31e499879279860b9a072ccf SHA-1: e46ec64adb94a41a74e9fab2b9f6e4e441c0ba1d SHA-256: 85200a6a4c9c10ca83c494e7448a61c190ebff3bff20bda8e29c4ece74079072

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The presence of numerous links pointing to compromised CMS upload directories and disposable hosting further supports a phishing or malware distribution scheme. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/6d1eefbe5f3449350eab317194ab0e7d/67953341003.pdf In PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qiqi6kqtl1p7uggl7iqli78p71/fedopop.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/6fc05ff625b0f399e4fa35262872094f/sorivabixi.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/6c7714cb14bb8225bbb782a38cc3e20c/reniroluwekun.pdfIn PDF document text
- https://penal-garazh.ru/files/27032250566.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac073644d23---97371841226.pdfIn PDF document text
- https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/d909fe35f0e2ef478eeeb863e294ed72/78148586409.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f581e346545---72099010531.pdfIn PDF document text
- http://mediaworld.pro/ckfinder/userfiles/files/notutidumafimibib.pdfIn PDF document text
- https://ataru.site/js/ckfinder/userfiles/files/gepinepejatifonuj.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/lesap.pdfIn PDF document text
- http://nature-revive.org/files/file/9608278449.pdfIn PDF document text
- https://addsfly.com/userfiles/file/lejolemitonona.pdfIn PDF document text
- http://sxsasa.org/images_fck/file/1627084988.pdfIn PDF document text
- https://smilaxlabs.com/userfiles/files/95539415114.pdfIn PDF document text
- https://oliogalanis.com/file/39033571086.pdfIn PDF document text
- https://soechi.net/userfiles/file/60581342134.pdfIn PDF document text
- https://monyetmesum.com/contents//files/xapijodudav.pdfIn PDF document text
- http://sake2metustin.com/uploads/files/63665369546.pdfIn PDF document text
- https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/97faf5a80843ac1dac79f27e212a5d2d/65660489233.pdfIn PDF document text
- https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/17c17a5fe23e270079c4f27c690c4536/tizexegukezozakuwat.pdfIn PDF document text
- https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/ue6p0b8ebocsri3qsmoovmq250/56744057464.pdfIn PDF document text
- http://mijn-nederland.nl/userfiles/file/nusisopolozisutivawidese.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=what+does+ily+stand+forPDF 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_off0000c472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC472	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dc89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC89	10560 bytes
SHA-256: `cd13acde18585c31555047c95e009fb0d697405a01699caff658ade6bec4a567`
`font_02_sfnt_off0000f491.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF491	19956 bytes
SHA-256: `6c876cac530e9426e7dc812e81173abef33c2061b4e7b2f27a26e20674641c45`

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