Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f6e13f799f3638…

MALICIOUS

PDF

79.3 KB Created: 2021-09-06 02:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4fb6922509eef8a348b959f914d1f2f3 SHA-1: 461c26e47dc95a213a9a99855ab797a011e5ef1f SHA-256: 46f6e13f799f3638ebdfa61afb62a12a1ea1d6ae2ed6430ddf6b3f70c5cc32e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised websites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://anhopphat.com/uploads/files/71023957318.pdf In PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/7635af0aa3d62cfba1f3fc926d060bd4/wubofunezago.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/3mg1mvae14jc9ho888183skhmf/13460122024.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/3bdc910e9c09c2de2bc552c5705ba57d/jajawu.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac23b760e3c---borudukavalilago.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/kimodanujivakelizobof.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/nalofirenamawimaz.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/bogokatorisipuri.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/64867512551.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210704062155137.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/4840026856.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210712092723.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/9992665531.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd1d4d0641---giwinijabazijavisejebuna.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/74166603442.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nexabesok.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/sisobogedejizufedisi.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/44769504456.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/0fbkd6i509tldt789pkksrte2q/xowotiwozo.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/13954801217.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/lijoru.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/78190440942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mental+maths+worksheets+for+lkgPDF 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_off0000cff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 18140 bytes
SHA-256: 0158bc7b153cf3f45d59c0094e47022d72797c32cde1af46a3d29f45232425b8
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 10740 bytes
SHA-256: ab357e785f0e0888963d7e27a62db5adbdc016a8cf31a79157ff146f4c4c05e1
font_02_sfnt_off00011800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11800 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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