Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f49b3b8ea41b244…

MALICIOUS

PDF

68.0 KB Created: 2021-09-28 11:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5b8ba377064ef1c0673702c30b88f091 SHA-1: d9cddd2f938de5c2044114936183d6e9e3e7ef66 SHA-256: 6f49b3b8ea41b2446593f02de52f65d85129ba9d1292bee66e12f895489567ce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing campaigns. It contains numerous links pointing to external domains, many of which are hosted on compromised CMS platforms or disposable hosting. While no scripts were directly extracted, the structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites or download further malware, aligning with spearphishing attachment techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95125698559.pdf In PDF document text
    • http://ingmarcofaedi.com/userfiles/files/94052133899.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/21439581837.pdfIn PDF document text
    • https://binhvi.com/upload/files/wabif.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/tujugepiveludegovuw.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/womoref.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/nizavuw.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/32646507741.pdfIn PDF document text
    • http://c-amc.com/upload/files/muwedovopetazujofila.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/32204539616.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/jujotolijodoziselogelulud.pdfIn PDF document text
    • http://blueyee.com/upload/file/230612545950.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd42a50bea---65788657545.pdfIn PDF document text
    • http://dentherapia.hu/files/file/gizefekipixakufevoxagenog.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/subunemadekogeditix.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/roxazumemiwawemaba.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/97851081177.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/disakakirenabiruzipisima.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ff9669830ae4db5fc8a418acdfa04232/78244705548.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109160400476231.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1614d480379f42---fudazepozefamuv.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/56306840142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=4shar%C3%A9d+pro+apk+downloadPDF 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_off0000ad5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5B 14248 bytes
SHA-256: f6a441b10df64d7d7c446ffe8d2a3efb21e0e5ee38bb9082b34963a3edcfd30b
font_01_sfnt_off0000d0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FA 10480 bytes
SHA-256: 0181043ab3605f95e3560e27296743bcf91082cd3cc093109b2b2d225331234e
font_02_sfnt_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1