PDF malware analysis — malicious · fa1a8a4febcc3cef

MALICIOUS

PDF

76.9 KB Created: 2021-09-08 01:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 3f9d6ba43f8f98cc3e15a1c36a2d6f30 SHA-1: 4c88b05aeb67f393dd6a55e83814bc437504b5cd SHA-256: fa1a8a4febcc3ceff18bdbfa5a3fc19b10ca8b1063d160eb980e024b8ff0d563

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect victims to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://evergreencans.com/userfiles/file/bofimujofokox.pdf In PDF document text
- http://sarljarry.fr/userfiles/file/66810112373.pdfIn PDF document text
- https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/49e3da813ad1b2ec4d9d9ab8c35a51b6/45422248650.pdfIn PDF document text
- https://advantagelic.com/singhania/downloads/file/wusotedabitapopugale.pdfIn PDF document text
- https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/c83ea4e515416b3bf982e77a81dc1095/gikevemabudon.pdfIn PDF document text
- http://crisismobile.com/ckfinder/userfiles/files/84550587585.pdfIn PDF document text
- https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/5c81c72068d1e25a91497ca0d136466f/24563756677.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/182a52c2f280480971424c7d0c724a22/tomuvoduzofalurofabidevik.pdfIn PDF document text
- http://abnicum.com/files/file/99095130484.pdfIn PDF document text
- http://zhxndl.com/uploadfiles/files/gazinomarebitov.pdfIn PDF document text
- http://instant-image.net/UserFiles/Site/File/31268687027.pdfIn PDF document text
- http://xn--o79av69abka850ab6c.com/upload/file/202108090713391050.pdfIn PDF document text
- https://mangmalungtea.com/userfiles/file/65726188485.pdfIn PDF document text
- http://prvugkh.ru/uploads/files/rojupiboniwen.pdfIn PDF document text
- http://hagelkonzept.com/userfiles/file/9639018474.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fccd6796520f702b4af7ca5e9e68e234/fivelivegalotezis.pdfIn PDF document text
- https://ajitcoatings.com/uploads/dunekafawuler.pdfIn PDF document text
- http://righetti1970.com/clients/872956/File/jawawu.pdfIn PDF document text
- https://toolsatool.com/userfiles/files/99219143936.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d796d589829---89635067149.pdfIn PDF document text
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/d1ab3bbda757398827c9fae6cbb0a5a2/78040053789.pdfIn PDF document text
- https://konyaalotaksi.com/userfiles/file/1763572614.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/0dn4agk6od1g5505rnenakcknd/15316238326.pdfIn PDF document text
- http://gernano.eu/gfx/userfiles/files/tomajonofifikub.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=adverbs+examples+pdfPDF 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_off0000c873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC873	17816 bytes
SHA-256: `01df9134062586a0c56291a94e038656021877a909734b6c8993f777059b4443`
`font_01_sfnt_off0000f611.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF611	10532 bytes
SHA-256: `b5d35d9864f520ba89f0631f434fce72c1d7445b82c79bc0abbc745269ef42cf`
`font_02_sfnt_off00010de5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DE5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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