Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb57c8fd2e65ca6…

MALICIOUS

PDF

66.0 KB Created: 2021-06-06 18:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7c2b4c1014d3db413c637d5ba33671a SHA-1: 19769113d8efabd1209ab7da4db63966e4124fdd SHA-256: 9bb57c8fd2e65ca60f0f7be60b337cb1f44214c0957a158855788d55fe29ca41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to lead users to phishing pages or download further malware. The presence of external URIs and link farm heuristics strongly suggests a malicious document designed for user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://allytemp.ru/uplcv?utm_term=star+wars+lethal+alliance+psp+romsmania
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f050e4e17f---bajijogawufagos.pdf
    • http://pileshoppen.dk/userfiles/file/futof.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/2e6cacc10ade6762d3141c925865875d/bupod.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/732062ec8c253783791b22f35e95965b/mimutexokenoritamek.pdf
    • https://scriptdd.com/_file/file/84404419303.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b330f4c7b1e---tenejetofavawosumubufi.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/25c6e1a6e9844f3cd3546e55f60affd0/pifavipafatanefipimamamul.pdf
    • http://franzoesischebulldoggen.eu/userfiles/file/46305801106.pdf
    • https://bhsbeacon.com/FCKeditor/file/dugajosibidetapojogusim.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/864000068288cf97ece76ec9e46b2642/texotajeda.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/61alvq15fvcp8r796hdq8vamk7/80198613959.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fa8b0fe20---71297982629.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871e39ea0e9---76868857423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c747.bin
7e86f5dc9f2f533f4d88fdb22e5b2fc390b26c953037a426827168d010fea345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC747 5368 bytes
font_01_sfnt_off0000d96d.bin
929a402bd113541a172081a733e7fbeb54743461b5ca1cdb9abff139ccab2060		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 9924 bytes

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