Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf46d42f539ed92…

MALICIOUS

PDF

84.4 KB Created: 2021-09-24 00:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a5514ccfc3ec5d9a1bf541f9e906662f SHA-1: bcd24472497f53ce47cb68bbee77b3f7331dff33 SHA-256: 7bf46d42f539ed92aca4994669de2b844eae1dc62e475a3593f7b8f7fe185b67
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a 'clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands. The document also hosts numerous links to potentially compromised WordPress sites, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613252de5e793---petubokavadugapitaxu.pdf In PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/16681415918.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/donudot.pdfIn PDF document text
    • http://skolky.info/foto/images/file/72624977756.pdfIn PDF document text
    • https://cooperspick.com/files/21533224445.pdfIn PDF document text
    • http://midospa.com/upload/files/zaduxujudi.pdfIn PDF document text
    • http://eksternest.be/images/file/xufivajajodu.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/3289387083.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/jamitodabi.pdfIn PDF document text
    • http://bankerz.in/qpic/files/suvusexelupum.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/gujaroxa.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/48489787931.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/41140299919.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/56779838618.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d3fb9dd2dfead94d67977152b830b47f/47265399984.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/fa3d629d3832d7c38bbdbff21cb83470/rulonupor.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/kuwuz.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_0F50A4851BD42719.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/15161208346.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/gigorejamifopejevimuf.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f804ad2cfb---55673135703.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/kusem.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/46199276138.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/zexukitat.pdfIn PDF document text
    • https://dyaa.club/uploads/file/levujoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=backtrack+5+apk+free+downloadPDF 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_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 10716 bytes
SHA-256: ae221169d213ee6f11de2369f9c06a2f3ee2e95dd972743903d578338966dd98
font_02_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 19088 bytes
SHA-256: 87a52b2140957cfcc2ad1e9298eca63910e9c16478f6ac837925d1f8e4db2535

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