PDF malware analysis — malicious · 7e268506e792b50f

MALICIOUS

PDF

90.3 KB Created: 2021-07-05 21:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: bc199ceb0e69058dd44e7bdd860c77a2 SHA-1: 5597a94d5eee0c69493ee4a1acb06a769a851d10 SHA-256: 7e268506e792b50fb1413a86fc2c0bc1abc4208370722529d1b54e633e007d97

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is a link farm on disposable hosting.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4b1f91e8d46eeb67a355592d77e2978c/nebuvufotijilopumup.pdf In PDF document text
- https://hojoairport.com/images/file/18121672118.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a63ff362b11---jovowomuzibapiropogolu.pdfIn PDF document text
- https://treasurehunterdetectors.com/ckfinder/userfiles/files/dajubisamopewawonasef.pdfIn PDF document text
- http://anhuishangbiao.com/upload_fck/file/2021-5-10/20210510023043678453.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d097df11df---tajoj.pdfIn PDF document text
- http://tvoirostov.ru/ckfinder/userfiles/files/vifuseta.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99a3fc69f7---83442902266.pdfIn PDF document text
- http://abogarestudio.com/userfiles/file/zameni.pdfIn PDF document text
- http://gruaszarate.com/ckfinder/userfiles/files/74026543079.pdfIn PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a9f6a831---10891380494.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087162d59b14---febukavazorapebupisibine.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ns1m4h7c0bept3vr0vv08kl6m7/didonitanosirokezalor.pdfIn PDF document text
- http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/gaxufuvedi.pdfIn PDF document text
- http://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/futujozar.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073fe7bf1df9---xuveludefala.pdfIn PDF document text
- https://floridainvestment.cz/files/file/61220816427.pdfIn PDF document text
- http://www.logomarcanet.com/userfiles/file/58203689266.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cf7ef9268a67323bbf9390ee09a4342a/40635752515.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/9725d5119506311e68c4b157f719963e/ladusekafagabo.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608cacdee80b3---5034711481.pdfIn PDF document text
- https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/puh4qm7ui9asvs88ss01qa89kk/57547747354.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/1aa6183f0b98bce2ce66de4e67399634/xosibevoritapiz.pdfIn PDF document text
- http://doubles301.jp/files/ckeditor/files/bikuguwupojifuve.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a6897372c5a8608c5e502c93980a27ab/rijonixiduta.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f64d15a255---20136316471.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/08a2041def39af2431d53aa12b99c332/doguveleninuzufaxonujad.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b3a577480---niluvagixezu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=table+worksheet+for+class+4PDF 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_off0000fcb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCB5	17596 bytes
SHA-256: `3b23e4250ffb04fd790771961a0bbf6de9ff2658bda73c1ce17f553cc24c7252`
`font_01_sfnt_off00012afc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AFC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014313.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14313	10596 bytes
SHA-256: `010606dd9e7fad87e213e534ee5ec676d621fcef93aa704d3e18cdb0dea322ad`

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