PDF malware analysis — malicious · a6a28c19174ee86b

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 03:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 35dffcb982fbc30171832493879518a4 SHA-1: 5fe9084d20bd508073ecec7b6dedfd18be40338d SHA-256: a6a28c19174ee86b6e6110aaf18f199d711f2ee970c2ee5f881b784011159804

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and does not provide clear textual content, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://alkanboya.com/files/file///ramolomape.pdf In PDF document text
- http://stigstudiotecnico.it/userfiles/files/rufitujezug.pdfIn PDF document text
- http://pensjonatagat.pl/userfiles/file/38908864215.pdfIn PDF document text
- https://daaeportrett.no/upload/file/91120145139.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907ce19e50f---4752322327.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pcbhqd8mmmiktjm8grgmcf4ih7/71011386580.pdfIn PDF document text
- http://logo4you.dk/userfiles/file/dafugogusonedegamuvogat.pdfIn PDF document text
- https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//79876604149.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cff2680fc---74755421762.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/lbkmabhn37l7m8g6pqro6gb63l/42075148489.pdfIn PDF document text
- https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/f18c96983d935b75c65e497da0bfb0a7/92336041122.pdfIn PDF document text
- http://adria-ex.com/images/blog//file/74102464460.pdfIn PDF document text
- http://activesolutionelectric.com/images/file/tereme.pdfIn PDF document text
- http://stillwaterponies83.com/clients/74660/File/kiragavo.pdfIn PDF document text
- http://schokobrunnen.com/idata/81182350170.pdfIn PDF document text
- http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/c4914ac566209ccc0461c2e4b78f364c/88762093810.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/41ef1642d369eac4014a0bb199185c12/zewuwaseluvow.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b740bd3e8e6---fubafe.pdfIn PDF document text
- https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/0d8b8f225cb97fe9388ce086f62e2c74/ninat.pdfIn PDF document text
- http://idealhca.com/admin/images/file/pewijuwesajefukoxubix.pdfIn PDF document text
- https://mma-montessori.com/admin/ckfinder/userfiles/files/soluzazomarokosanojunoj.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160797a6114bd3---81824480776.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160719d4c2bc62---87368164352.pdfIn PDF document text
- https://apskarota.org/userfiles/file/77380805762.pdfIn PDF document text
- http://servis-hradec.cz/files/file/63976286520.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7644kc8cmaujvokera086416q4/90911792022.pdfIn PDF document text
- https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/93268434715d83ff343c77c81855799e/kigupoxulefovir.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d959d2d4438---59505420541.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+main+force+driving+thermohaline+circulation+isPDF 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_off0000edcb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDCB	11052 bytes
SHA-256: `d91296ea7789e972728f84ad51e36f6cbc190c612becf1770bd26c25bd57875f`
`font_01_sfnt_off00010722.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10722	17300 bytes
SHA-256: `c0d1d57a0d71b7001a99ffa3c06a5139feca4abf17a92a4f59c73812c86e2346`
`font_02_sfnt_off00013467.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13467	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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