Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d926983122e894…

MALICIOUS

PDF

85.5 KB Created: 2021-07-08 00:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9cca65fc190809935094a3aadc586b63 SHA-1: caac4a427322b91f99d3ac643d5e32c351089745 SHA-256: 43d926983122e894d8617e5ab24ab53d68638ddd4f3795a1a2e451cea0bbc21c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The presence of 'utm_term=pretending+to+be+normal+pdf' in one URL further supports a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3d6fbba1174ff8f98ca5d920c2bf7762/24782421600.pdf In PDF document text
    • http://georgekoldun.com/var/upload/file/75464005237.pdfIn PDF document text
    • http://allycatering.com/userfiles/kokezube.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/dekafexemu.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/47697782085.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/3490411844f842a1992ebf7e42fbd1a0/12709368503.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/gabeverugobajop.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/duzuneviguruzid.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/sakulavixawe.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6939178b4b---kumubepoxikoroxuzegabe.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/48378300424.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/88679461396.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b74c19028---34004755419.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nejepuxa.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a194657bc01---gurusezajinuvivekadaf.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d767ab358638808b67205036470dc6b8/84230945334.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/90069618164.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c997119532b---tetipi.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/2255771324.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/51295b43c9ed8f538e0f6ddbc559766d/dolofam.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b479121e606---59058587419.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/73497661942.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086094947235---zobipalekub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pretending+to+be+normal+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9B 10812 bytes
SHA-256: fd8dd660d02a26be49a444dc3bd3b79fdcd476af93b3caa28cc3e78cd7c1cc67
font_01_sfnt_off0001030a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 17664 bytes
SHA-256: 13fd614fe12e3fd6d7d7de09d93844291a394229aab385e6b28018e739af47f0

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