Malicious PDF — malware analysis report

Static analysis result for SHA-256 1288c9d555074200…

MALICIOUS

PDF

106.7 KB Created: 2021-09-01 05:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 910f3a1aacf92e551a287f3e19ef5d9d SHA-1: 9eded2c276f950800d81c7cf197fe37e0f49d865 SHA-256: 1288c9d55507420040424068e10c4af4859c1064c47623644e74306f10a0bd27
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and the overall structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://shen-su.eu/gfx/userfiles/files/69476998239.pdf In PDF document text
    • https://strategieb2b.com/userfiles/file/75793001343.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/db9e526ac0752c952e1e8a8e109f259b/93579795444.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/88142978940.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/peronamur.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8c49c0c80---38589146707.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/aba0af36a362e310768f313ec3efff04/gozinorifununinavibazif.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16114608645879---nepufozujixegikiwas.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/1cb413c0a1492c2be8f92d2719cc7518/sonoxoperapejoxitajo.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/93034076367.pdfIn PDF document text
    • https://birudongker.com/contents//files/17857962282.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b3769b03af1c5afe56d69989ca7d98f/lorosotebufejogomufo.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b936f12e68---silazovoxakelebarufivor.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/vekewiderevufubiluz.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/kijasabekawinotumedak.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/27739184192.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ef71e4866---sekukoripulevupuvupuk.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/wivakevomajo.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/rapemoburopopikuvafoz.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ba1e93a67---94877516527.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fbaeea1b8bb249fc51fe2d470359cea1/12701387531.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129a9e72b577---zufuzuwidawujowuwo.pdfIn PDF document text
    • https://semut73.com/contents//files/mezawo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=avd+manager+linuxPDF link annotation
    • https://developer.android.com/studio/run/emulator.htmltheIn PDF document text
    • 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_off00013a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A31 19952 bytes
SHA-256: 87ad8f35e0fcaf9967bb279e9d5f6ad0458c41f5c7a3b6a56a3150655f499480
font_01_sfnt_off00016de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000185ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185FF 10452 bytes
SHA-256: 6800818c2328e08ed76f77112b85d78ef10ca53f812d33b2a6a53e0b83ffc411

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