Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdf6df14710e27c…

MALICIOUS

PDF

91.4 KB Created: 2021-08-16 19:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5bc22054325cc277013e16d2c82d9943 SHA-1: c5a4ec04dbc0544f16d2231c35d843ec21f65716 SHA-256: 6bdf6df14710e27c475008686db35a3e1ac4f6c6825ea52d3669f3667ccdeb90
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The presence of numerous unknown URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f2190ca24eae68906025e2b167fee612/gavujiwuwibomupapilivefe.pdf In PDF document text
    • http://hongquangled.com/upload/files/41769620018.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/abkfmp8haedma646biqfiuuah3/letatenamofase.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/79047101716.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/bojoveseroboso.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/f6ieo29mtge6667qf93rngsr81/33194942239.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3098052304---gofutezugedisepatide.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/dufazisiwona.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820bf3e0f23---tibuxufo.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/81487875373.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/pigidolujivuto.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/kewulovanazirejadogon.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/94981238487.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d09762b298e---sileba.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210810_9D30F6145844E8DA.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/50771018347.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/02a635ba81405b32cfd04314d92da408/29020240373.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ee41621a43d---wukepu.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/93937267954.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa0e56b0c2---naxegadadorafugad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=grim+soul+survival+cheat+codesPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/giwiter.pdfIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 10736 bytes
SHA-256: cd76e5abcdf6a6ef990b3d8a7f5c9ef4986e428a9106eb4fe948eae10801499d
font_01_sfnt_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
font_02_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 17720 bytes
SHA-256: 8aacc476fb57c475bbf23908d7117758b8836ad425db7adca7ab5b85d983819e
font_03_sfnt_off00010db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000125c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C5 28044 bytes
SHA-256: 8810df874f001e2a152f235677f9cf9651af133c9652a91396a315c4df2dea8a

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