Malicious PDF — malware analysis report

Static analysis result for SHA-256 006c74e405995a09…

MALICIOUS

PDF

72.6 KB Created: 2021-09-09 23:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 122ec30bc963aadc97888c10007cb3b6 SHA-1: 22ef7546427ea3f592ef3fe0380bc5e043479b0c SHA-256: 006c74e405995a09479f78c2aa9b3eaa9cdb8d3d3752f56f57bde96ea7fd1495
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://smidgel.ru/uplcv?utm_term=putlocker+the+nanny PDF link annotation
    • https://littleedupark.com/ckfinder/userfiles/files/batafelazumewokapopalafip.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/84632632628.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/dilobelafemaza.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613029f3e21e1---5250949742.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/15045482533.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/javiv.pdfIn PDF document text
    • https://suncables.co/images/file/zopisek.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/161329d637b225---18041603743.pdfIn PDF document text
    • https://digireg.sk/upload/pimimudupokilozosavofutov.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/wuvorefumin.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/3090543773.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/33071740855.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/meramoresafofonobewa.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1bbd723bb---86236368957.pdfIn PDF document text
    • http://adveotec.com/img/file/jumopilil.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613773823e6f0---zoruvomusidub.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/rujijizituzufagemevunuz.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/7995944335.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138ed90607f9---rozozizupapokagedoneki.pdfIn PDF document text
    • http://njxinbell.com/upload/files/legawadisiwexe.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/fodaletazativ.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/75850080463.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_off0000b8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EB 10372 bytes
SHA-256: d188de49151cd084bc084552a477daf6cc9d76b8c8e848d93baf04a52853bf3e
font_02_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 16692 bytes
SHA-256: 0e95799bc3455d3896727b0dd13e90adb013cceee300a7f88e230af6fb7758fd