Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa13bb82ede66069…

MALICIOUS

PDF

85.0 KB Created: 2021-08-14 04:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b0600cbc15a719e6b87458106f70d15d SHA-1: 8a02519f9459fe1db35559761e5c396e7316b50d SHA-256: fa13bb82ede6606909815fe41428b0b18347096868c08720569f768228d60d7c
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The presence of a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste commands into a shell, a common technique for downloading and executing secondary payloads. Numerous URLs pointing to potentially compromised WordPress sites and disposable hosting were extracted, likely serving as download locations for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://zemiigori.com/uploads/file/kikefanixewev.pdf In PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878e620ab22---xufumosaxiwupumo.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/42620834562.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/460384267b2e10fa7b2010e0970d120f/lidamawaditubadixij.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/73879062757.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb281b2d371---dizasoxemiwonovelajasaw.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/57527960462.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1610d9aba2e5a8---zinakekesogasezixuwibeku.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05ab87b5a1---68361142514.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/37ad45bde3a87e237d261e7fb794907d/83787825041.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/32835759403.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad961d31247---86778420208.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff5192594d3---riwebofixepagerexag.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/93842039801.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/dajupaxek.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210808_142625.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921fbfe6ec3---regakexutadeto.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/rigumaga.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/46972651934.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/sivonenevopesavataki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+do+you+reschedule+a+meeting+in+zoomPDF 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_off0000e854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 16652 bytes
SHA-256: f0a8549adebb0fd42848e5314702f0487d0a60516b0b5d03aeffdfe31f4de9aa
font_01_sfnt_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA8 11168 bytes
SHA-256: 415314fd66935111f1945adb77fe1639bdad5fc2e7b6b15759b363613274a1f5

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