Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ce4466b7fd61e0…

MALICIOUS

PDF

82.5 KB Created: 2021-09-08 22:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 60486c9774648f9df4b4c1fddfa62451 SHA-1: c40932e663e8de5e68395febfc70372774173550 SHA-256: 29ce4466b7fd61e00fa7647fca8797529331e0f2484b4100487543b756c61772
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to lure users into downloading files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL analysis point to a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cafesezony.ru/fck_editor_files/files/vabam.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613440ee87691---virepoxofojiwufomovu.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/70393326979.pdfIn PDF document text
    • https://themalc.org/files/file/zinixudavazawemaluva.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/zotujipurilo.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/buteboned.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/potiwijunu.pdfIn PDF document text
    • http://ukrfirework.com/images/file/11928643579.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/zofazipufulozawopelofajif.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/6thv92fhoblqi38eieckps193l/numajutimewojojikodigin.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/3d419d3fa34dd0aab1ee6f0c66fcc139/gesuvavimezozeponeroxarab.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/58041823967.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/dalajukema.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/ramikiripopimoxorukulid.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/vesexevasamuwatoduzi.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa86ee3329---72927797211.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/fezubenidelodukuselaxe.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161361dec1da92---79759041837.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/lupirunurigogowofil.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/buliseviwoxojaret.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/lolewigagoxar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=qismat+punjabi+movie+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_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 11032 bytes
SHA-256: 4eb5af2f73c074dae093050b7211e90215a6175bc5fcfba2cfff7a9d86840d29
font_02_sfnt_off00010ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED2 18284 bytes
SHA-256: 81bad03cd79b8d283cb937ecfe1b6ba838ec90330cbb54fb047a030d597d2db4