Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2ed0e371f5d43f…

MALICIOUS

PDF

95.2 KB Created: 2021-09-03 13:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0c0e8d1ef8a6a4eb3911742765e5de41 SHA-1: a135b4831ec4ce02acd27d798ee02706cfa90b9a SHA-256: 9f2ed0e371f5d43fabafa1b3b761e3b0c991f504ec63f9d6fc2ac76284e4fa0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites and disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL distribution are characteristic of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://win-sonic.com/kida2018/ck_imgs/files/muzaze.pdf In PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0836431392---meguturofatitanuje.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210826015617.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/31419288524.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/94399403978.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/tifexubasavawugovizur.pdfIn PDF document text
    • http://yuhongzg.com/d/files/78956797631.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606defc856397---jokukuwebonosefumobi.pdfIn PDF document text
    • https://coil.hk/upload/files/43864204109.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611a39dad27aa---jagowaber.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/kukapuvunujinar.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a8c88febab206c91e325f851b6892d33/35153649341.pdfIn PDF document text
    • http://hongdacable.com/d/files/nodozuvomimusobesakiv.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/47799766621.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/47899552121.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/surisiravubupuvopapo.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1794c2f1f---vodatojufibowu.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/1978788602.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210613134506.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/99851776142.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/33028655732.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/rosawipusi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f50cce0d2.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/71364324916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=thermoelement+funktionsweise+pdfPDF 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_off00010afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 20640 bytes
SHA-256: da4b4167e86345d22399f3f42df6f2d7a7d821474cd32647aed31199af5573d0
font_01_sfnt_off00013ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBB 10840 bytes
SHA-256: 45a8c4a0c08667c79f0e047a37905c9e4b00cbc87e8d93189421deebe84ca3a2
font_02_sfnt_off0001579f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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