Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f083524546da13…

MALICIOUS

PDF

72.6 KB Created: 2021-09-04 09:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0127f0ca3cfb6e7e1606d93781d16e88 SHA-1: d3299926e9b0896b8b1f353d8dbe7941d76f3087 SHA-256: 01f083524546da13cc234fc47091e6d03a96c2b6d1b57bcaa0665285d5aced14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 22 distinct hosts, many of which appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://99shayari.in/userfiles/files/71621774395.pdf In PDF document text
    • http://www.contectrade.hu/fckfiles/file/16556048601.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16079daa78e8a8---dozev.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/76852682326.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/25071393463.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/79482759712.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/39342543280.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/nelulilivabalawodujikemo.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/48799590134.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/wokunidijutiwajudokuren.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9e8f614eb64e03635421eba0be9cb6ae/36771997880.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c585da686---98066328853.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b7ca02df0---17181195539.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9397c5a877---49925327166.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cb44b21df10bee63c1e8d2caeab3645/jegabagogisiwefupujagoz.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/60219670214.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/xamowap.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/lugesikedugifodovor.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d085ed0440---wivedi.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2273c508cf---94745274601.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a302e288f4f1fc45d2ddfa4688a2f3a1/77766977132.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tvgpnr23rdnifm8tcbaaroe5e7/33730499089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=8+point+compass+worksheetsPDF 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_off0000ba20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD237 10880 bytes
SHA-256: 326eb6d9168d99a2fdea937f6ccb743afcd94388b66b6b85c20785cf418a831a
font_02_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 16248 bytes
SHA-256: ea833f38d600c34da995248d8c705f375d02b38251317e76d6329b8607d2470e

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