PDF malware analysis — malicious · 240bca5a58c48288

MALICIOUS

PDF

79.7 KB Created: 2021-07-04 07:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 324d72505ea3d6c97ab82b4b6543ecdf SHA-1: 4a583e73e0f63a2db51ebfc06d9498e56801bb66 SHA-256: 240bca5a58c48288872712a0072900fb26f52380cfd7294ec0a31cf7f9517fc8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload storage and disposable hosting. These URLs are likely part of a link farm designed to phish users or redirect them to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/c1a4b7895d6081f89e8a161b39f19264/98320883919.pdf In PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5d71b2037---35511947292.pdfIn PDF document text
- https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/2cfhoq196o17kvf1sgovrr5rf7/movujuso.pdfIn PDF document text
- https://vicotelecom.vn/static/source/images/file/49661251435.pdfIn PDF document text
- https://bikidi.com/UpFiles/WebEditorFiles/file/wopogojobazosilawuwitufe.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a1a2eaef2bde0c85f94f98c9075d2414/xixopuxotexifilogezedite.pdfIn PDF document text
- https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/2dd20361d27e6c382a15c8a0fa21ebe1/4001017548.pdfIn PDF document text
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/scitph9k6l7a9i2q60if899p3r/lagaluge.pdfIn PDF document text
- http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609beb9c60f76---vogulojivufozu.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e121a5799e8---2293657184.pdfIn PDF document text
- https://okud-istra.hr/userfiles/file/82823384923.pdfIn PDF document text
- http://ggmtc.net/userfiles/files/72731322023.pdfIn PDF document text
- https://annjulieskarpmo.com/userfiles/file/naxakinexujifisaxakobaj.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad31620a5d---jidafivoretijukek.pdfIn PDF document text
- https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/f6a537bdeff04ba16c03d33681c8fcd7/72828430152.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a28504b6d3b---vulejopuj.pdfIn PDF document text
- http://big-blue-bus.com/pics/fotos/1/file/47669264940.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085507bbccf3---70947502732.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb07058402---74396037134.pdfIn PDF document text
- https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/3hhj18u0mhdntdsnqrajoog5mh/jojugufinuxodo.pdfIn PDF document text
- http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6329v66o3q8k2q9dfq4rtls41/24910203138.pdfIn PDF document text
- https://multimetrics.com/ckfinder/userfiles/files/89594843528.pdfIn PDF document text
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/q0v8ttfks0pmrid0bhhbr5vum1/19534730273.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0140eec77---venonivu.pdfIn PDF document text
- https://pabrikangka.com/contents//files/27054053846.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=bicycle+serial+number+locationPDF 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_off0000d6de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6DE	16060 bytes
SHA-256: `218785962c84a42b666693cd3728798f4b8e55b6dfe454d19c136c9fa8d7e443`
`font_01_sfnt_off00010076.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10076	10796 bytes
SHA-256: `25172071ac3fcb44a8f79b3c7f44e21c54b6335e2f346b82694073e99a1dfb30`
`font_02_sfnt_off0001196a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1196A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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