PDF malware analysis — malicious · a2d2d82589338388

MALICIOUS

PDF

77.0 KB Created: 2021-05-06 22:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: c1efc1874d4b7b5f73a74d56420be7d1 SHA-1: 61dffeb5fbabf2ab78cdc40b734feb681a28a795 SHA-256: a2d2d825893383889621e4384aa8dbd2554eda4d69c3a4f3941f13f612de2fcd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and link farm heuristics, indicating a likely attempt to redirect users to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to exploit users.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=aashiyana+mera+female+ringtone++pagalworld PDF link annotation
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/m470qscn9v0760tkffcrsnmbhg/57993198161.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7u06jdr8hufq8baf9k206ltb63/tukikajorokoxusaxibov.pdfIn PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/66934974e9a0fa3e32f18217ef07fc28/mejatajoxenaxoponul.pdfIn PDF document text
- http://sns.hu/_user/file/79645723369.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/btpeq2j8gafbkdokedubrgh945/62629748665.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7cc0e0dc---lapodonudokuzewitaturi.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/m182u6lv1kju1pg2vasu51tli1/78915334522.pdfIn PDF document text
- https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/b16d06e7b35b99ca4c32cbcddb4b9a6f/wejevigiwuzurinupu.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/79959a6072cee3ce4a2f2effdc9bb966/22042583056.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160929ec03a2db---vasiravitowu.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7a326aa1cd469df85c9453b15326e9c1/bukuwuwatidan.pdfIn PDF document text
- https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/e2b5156ef8a1b25a0500c8af1f653125/panumo.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbc47c65a6---nazajifo.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608d165943081---46343318785.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9448afc69---33710750411.pdfIn PDF document text
- https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/998f7b3b78a0218bb9b34a70256ab78a/10560098367.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e500bd1f9---46711191165.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e079.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE079	5428 bytes
SHA-256: `a96673a0fd0b6825bc4a315db102096eee8732a320e9617976d4d16c22a75092`
`font_01_sfnt_off0000f2ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2CA	11324 bytes
SHA-256: `1042940aa8b3b631e30ac8011fb64ec036b44b6ffd7e0c24c187d1d61812db73`
`font_02_sfnt_off0001197a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1197A	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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