Malicious PDF — malware analysis report

Static analysis result for SHA-256 607eaa69737c11fd…

MALICIOUS

PDF

96.9 KB Created: 2021-09-08 04:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: efb78d40a6b4d4e2346bc290bd55763f SHA-1: 5465d9df97916f358800998c99517e018e5a2e8c SHA-256: 607eaa69737c11fd1999d1e16922e6d1c5c9c193cd43bd69fc6caaaadcd9b43c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, pointing to compromised websites and disposable hosting. The PDF structure and embedded content suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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/5b1b1d84b78142e0ce46819bb0819dca/tanifokabowilamu.pdf In PDF document text
    • https://tedesco.pl/userfiles/file/jaturizuju.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/10301635777.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/wireraruluviwivalilut.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109010718145689.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/68511170552.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/nuvajirunamipa.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/31ddai8okj0cckt3r14ghcnl9c/jirenejokemokasitogoruw.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/logekavuvunabofe.pdfIn PDF document text
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/75339834232.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/gebuguminuw.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/xobafilogipigojetowulut.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/tofarixitu.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a9069ab2b---wefotimu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a263dbda---ziroxerexolexujiretadedot.pdfIn PDF document text
    • http://blatt-gruen.ch/files/47203966135.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/wawobanoloxomufiginope.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1d2c6c04f---kogefilizepowusiga.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/wenifowegal.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/voxaz.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/50607051469.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/560aa3109e411ccac22d8b7c07228869/depibupadelom.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/rikigeziwab.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/toviribon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=hp+envy+15+notebook+pc+manualPDF 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_off000114b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B2 10864 bytes
SHA-256: 6b132e6f8fe87edecb37809a3337baacbb2a36bde69207c45e26bf2942b6a3b0
font_01_sfnt_off00012da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA9 18616 bytes
SHA-256: e2f640c310a2597782e488e0f97ccbb256b0589ef0464416acd868339adcd623
font_02_sfnt_off00015de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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