Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f790d887508ecb6…

MALICIOUS

PDF

76.9 KB Created: 2021-09-06 10:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 118d28a5be3c81f337f795bab2908422 SHA-1: 760b15b11cd92247fd162a6faf98a4dde4e663c1 SHA-256: 2f790d887508ecb6b4e4bed532ab7c4afffb1a4a0b27e0dd20a4f343bad8964a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to websites hosted on compromised Content Management Systems (CMS) or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 http://a2itsolutions.com/chop/multimedia/userfiles/file/89226526566.pdf In PDF document text
    • https://ksuskalology.com/images/file/99608034775.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/menenawuzos.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210704180455.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/53056220377.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2e7d75c92f48539b8f23c26ff1bd952f/95705048080.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/ranaxekunav.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a319479f66a---rezijexuzozirotureza.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/3028935243.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/61556074453.pdfIn PDF document text
    • http://darienhighschool1961.com/clients/6/6a/6a5b14ca9cca6c9c7811e238b5dc87af/File/44807934272.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/silowidokeji.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/cauc3orb6hgjqbu4bho6prhkfr/79418146616.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/94c315317cf8c63a62412b09a6f60e30/sepuvotedisubobinebava.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/vefifovupakazikomizegara.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/59573646080.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/najar.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b150aa16e9c---45897745280.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1970956b2---40445481956.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/65978632529.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/20918737476.pdfIn PDF document text
    • http://gabortech.com/admin/file/jumupoponakutopapikevapuk.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14927c88b6---tatip.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/72926d9d5485bfff3978d3780690767f/2094662462.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fec4232584---rinamatererizodevomewot.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/xubedotipokiziwuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=travel+and+tourism+vocabulary+pdfPDF 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.

FilenameKindSourceSize
font_00_sfnt_off0000c518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 18612 bytes
SHA-256: 12b30411f16a2571b25848c97eb9e831e02da82915064f90e85070862618e40a
font_02_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 11164 bytes
SHA-256: 2febb1c029c38e7e8fe5f8511082b1a98d12ed4c5a73d09d3fc99ca096622b76

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