Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b24f71be9801fde…

MALICIOUS

PDF

81.9 KB Created: 2021-09-16 10:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8c689cf25b061ecf305a6a99fdf38270 SHA-1: bd61e424c1d13aa1617c28399aaf7262041483fb SHA-256: 0b24f71be9801fdeccdc910e9fdca1e8bf072186b181c0ad6421fb2716aaeb11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Several extracted URLs point to potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://sanipro.ma/app/webroot/uploaderfiles/44563739554.pdf In PDF document text
    • http://transportdiverse.com/uploads/files/572616780.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/65090473553.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/towupujemidim.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/49583218775.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/50529641523.pdfIn PDF document text
    • http://santeh.md/img/files/mumoxiben.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/25133097508.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090711322053.pdfIn PDF document text
    • http://citra.cl/userfiles/file/30320084939.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/75925305724.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/61231812269.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/dofaf.pdfIn PDF document text
    • http://dobermanncz.eu/files/57580072451.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a0948d0cc93b752c9005e9a38691f356/50500739767.pdfIn PDF document text
    • http://nemalipics.com/sisesoxezenajigigizu.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/22284870293.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/51686131866.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/38343891789ca9e196f3b90d3503608b/fasesonebapisimofesafun.pdfIn PDF document text
    • http://ilkemymm.com/image/files/kexezimasevokaxi.pdfIn PDF document text
    • https://lorus.rs/files/jamutuvonopogoxuwatoze.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/delepubi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/95b3014b78ed7f05f288389ab92faa4d/87450278265.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/dc9980998ce3419d0fa32df4d9565b20/zodibawelewipaf.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/74874661591.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/biwigobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=stream+the+phantom+menacePDF 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_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 10408 bytes
SHA-256: 1e70506e24106de4c47a0245d662170cfca1e7e057189a55f2a8118e8176f7ee
font_02_sfnt_off00010a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 18348 bytes
SHA-256: cfdaa467b260ea8fced8d7b5cb1a72d043f81071e65665b72a4276b0ce6c6cd4

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