Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fade283276a3b1…

MALICIOUS

PDF

74.4 KB Created: 2021-09-07 17:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c10cd90e167751f2d7cb110e719879c4 SHA-1: 194c45e957a96c2e662b49fd7248580c8de165c8 SHA-256: 67fade283276a3b174bdb2d5ef7c33d24332212c3b0741b8eeb57b6465aec607
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or link farm attack pattern. The primary purpose appears to be directing users to external websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://synerhu.ru/uplcv?utm_term=rca+root+cause+analysis+pdf PDF link annotation
    • https://ksboutlet.com/file/files/63573013419.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/buvigarajogurowotokewi.pdfIn PDF document text
    • http://hoskinspugs.net/clients/40498/File/duletitoromilul.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/rufavomorirukeduwezij.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76e50d70fd---37361924276.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e600fb7e36---pigajefo.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/kelakadoxolol.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/zagejakafuzidozulez.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430134630318419.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/7tk33da4s1lrrrf4k5gnso85m0/12801406959.pdfIn PDF document text
    • https://aokman-drive.com/d/files/36936029767.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c1e56a4d94---sogovajorilimumosuvafiro.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/mumet.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/zedosiv.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/68884507845.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/gv7uqjsark325nbdfla4o5sl7n/88582048507.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5bfe37dc3---jiperobenipu.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ecace12f575---relusumijuno.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/rijani.pdfIn PDF document text
    • https://efnnma.org/files/file/xusoteb.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/navuwunokezofegelidisobix.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/8rqtp78pel9e804ltnrrva99e1/36718153591.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79A 10872 bytes
SHA-256: c6c6edcbc2bbe952e510b7200ae742301254e8aa2d9bb3672db81201f97a8a7d
font_02_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 16856 bytes
SHA-256: 4c0fbe8eb2ef0a4863c8e22ecfa6889bba4a3018d1a8acb6005bd8c93bc3aac6

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