Malicious PDF — malware analysis report

Static analysis result for SHA-256 699185e35230178c…

MALICIOUS

PDF

98.5 KB Created: 2021-07-19 00:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ac098f0d59c84ac3ad0e679ed4a5b902 SHA-1: dd3606f2f70ee1c11b6224f3caca960a8f499dc9 SHA-256: 699185e35230178c2fff4bfaefe0d1e8dbe264bad0faa3edb95c89ac24c8cab0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm hosted on compromised WordPress sites. The presence of numerous unknown URLs suggests a redirection mechanism designed to lead users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm nature are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/faf23bdab386d0734a2a7eca9ffba4d1/zibilewipejudiz.pdf In PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab978319a7---82621953377.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/96098309518.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/dapotabeluji.pdfIn PDF document text
    • http://placc.info/up_image/60490398942.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a481271776---89608641580.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/akinadaxebipuxomipomar.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/pomovitezoturanonaxorake.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/14415320843.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/jo1736ilafkkkne6e72sq8s8qd/zewifidarivefus.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9da264e41f---munelazikawonikoxi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4a9173960596143b27a6bccb35fb3167/limajesegusawapimotif.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/53259286658.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vipesivusomu.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/35tvt0al2fc15gf19dhkdk2lc1/26286115976.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/80669514927.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607378a10bc9f---bojuvutepuwarobelexot.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/gepatifusiviwenuxagivex.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/64788715025.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/93d10501ab8ba7c74c1a20b393087c5d/bufotafipares.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8af21620c---ximefirabomawato.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/35034775771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cracking+the+code+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_off00011c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C03 10808 bytes
SHA-256: 97f5cfabae11a5ba14b40299ffd0b454ce81f0b91840c825b7cc5fea4e333e69
font_01_sfnt_off000134b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC2 18488 bytes
SHA-256: 1c032915d8945f818ece8135b1d2fac180941e9700e44810e515ca2ef8b328a0

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