PDF malware analysis — malicious · 3b208f421a3f6d67

MALICIOUS

PDF

84.2 KB Created: 2021-07-14 04:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: aed7ea4d086892faf86fbbde5812bbb4 SHA-1: 6acb564b583f9e5565600c5a4d24d635b7d8be2a SHA-256: 3b208f421a3f6d6738de2871642a37c6aa6599b81b2dc52bfd774bba358dd5e6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous links pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

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://kodcomputers.ro/2664/uploads/65243924544.pdf In PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/ab1ac7b56f90d78a173964f1b84391bf/43062064452.pdfIn PDF document text
- https://tidurmalam.com/contents//files/38640311558.pdfIn PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f396b2b147571e362b8ce73b9645f9de/jijararamipevufagetaxir.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbab2fe65de---zumerajojaravuvoke.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160deadb730b70---32099898527.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824c2431e0d---70537245037.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beec704219---42239661828.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737d3e4ff57---3779778744.pdfIn PDF document text
- http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a65902746c---jijejif.pdfIn PDF document text
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ba12788444f8b8e893b67d2f0ee2afb4/vojekokazavaligubijug.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/59b9f4d4206495cb96c1d36ee543c1cd/43081159067.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ed98df13121001d7a8eb582e16b8eaeb/53030663495.pdfIn PDF document text
- http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d73ba4f272e986214b76a381a197a3db/motov.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/10148288895.pdfIn PDF document text
- http://dansungsala.com/uploads/files/rigokapagonulilodom.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e276d9786bac2cd0b1d3efed20cd998f/luwirujizorosanadavone.pdfIn PDF document text
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c0ee6fd8a---kabiz.pdfIn PDF document text
- http://vertracapital.com/uploads/files/35878788848.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852c1d8d573---netigivixixuvaxiwegok.pdfIn PDF document text
- http://gtshotel.it/images/file/panokavuzujevufagobetu.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edca70d826---18118003408.pdfIn PDF document text
- http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/mefajimuvawikup.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=gta+san+andreas+only+apk+downloadPDF 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_off0000e750.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE750	16900 bytes
SHA-256: `0ebf4a5b93d9bf1149ad4c0771d39d2503da6187c7379bd9c5a29a09d10a587c`
`font_01_sfnt_off000112f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112F9	10624 bytes
SHA-256: `a1e44584c94eb4ae2f8863805f9e9fac77bd74f43b13513c3f4dc9a6578d693a`
`font_02_sfnt_off00012b8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B8A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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