Malicious PDF — malware analysis report

Static analysis result for SHA-256 49cb42c355065da4…

MALICIOUS

PDF

76.1 KB Created: 2021-09-03 05:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6366a21763630628e18ad32c9a470ce9 SHA-1: dab7fc378093bcfde4b3685558390e45070c4852 SHA-256: 49cb42c355065da425103b094a5eef5f44247a5b977f07c5ce567ce29d617acd
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 ML classifiers and ClamAV, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and link farms on potentially compromised infrastructure strongly suggests a malicious intent to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=osho+books+in+urdu+pdf+free+download PDF link annotation
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/gosuvinuzubi.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd9dd99606---kijinelewikelejevi.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16072bec3b9e0d---47460337296.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b315742c708a7375bcb1a87f470baf9b/fivokeduponifaku.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/fisoredirefujefiv.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/n7kvf07akmc73ajp08pjulcie0/xiborotamatikud.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/nipib.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef9e4aa75---xenos.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/2118657786a7e58f353d62ab3f5aa865/44964432585.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/tawoludanuj.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/92987c5f1ebb5c4eda57202ddaa59016/nofuwedo.pdfIn PDF document text
    • http://rinsacars.com/files/others/47584039688.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/zegezukotodonin.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/15289934548.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/gopadi.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/747455528c59864053b7bdfc6b5fdd9e/satanalazunuk.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/saminibalenasigugawavide.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/voruzedikurinuniki.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b634ecfc2---beripizipabubusib.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/62600366952.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/31841771901.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076373d7b7e6---lepizipidevivexizepuzoka.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/maxiwidorepepirime.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60b7c82616091.pdfIn 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://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.

FilenameKindSourceSize
font_00_sfnt_off0000c3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 17568 bytes
SHA-256: ea7f20bde8a13a34c7b2ca6d4b95a46de0f533a559078d829f3defa49bf4bf51
font_02_sfnt_off000109a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 10940 bytes
SHA-256: 978dc5aa8d3445ab80d9d02bb17e875e261984109d66d927a79ecf1285c41e6b

Open this report in the interactive analyzer, or submit your own file for analysis.