Malicious PDF — malware analysis report

Static analysis result for SHA-256 624f0520d8ff737a…

MALICIOUS

PDF

68.4 KB Created: 2021-09-06 19:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b7f7ab6fafddb34da53cc227e1d976a3 SHA-1: c1101b9295e6477ec68ebb8983cae2c1331fc82b SHA-256: 624f0520d8ff737a04bf84481a45586c660474c6787cb7f5c95c78d06ab349b7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within a PDF document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dacinsara.ro/fckfiles/file/tetazi.pdf In PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5bcd8653a---46305313828.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/xafoxazole.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/55f4089cdc59c556d1e64a6f9cbf783d/51562206166.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/62224330746.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9bb8d24b7---75788897901.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/cc50ebfaae604ffe36ba6e0c667ed212/jugirixipal.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/remajujalawulebofa.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/fazewesawikiv.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/taveme.pdfIn PDF document text
    • http://yuhongzg.com/d/files/87984197277.pdfIn PDF document text
    • http://xn----8sbosgn1al9i.xn--p1ai/ckfinder/userfiles/files/42874175359.pdfIn PDF document text
    • http://prosquash.by/data/3738171104.pdfIn PDF document text
    • https://songhongresort.com/img/files/18039961949.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/13203651247.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9b9f71513---derajibok.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/12485949569.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91e322ecd---vosakog.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea07689fcf---jifixipemidufolap.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/4741105396.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/44550335821.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b4bfbb0a8---netipojakukawugi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=exercicios+reino+monera+pdfPDF 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_off0000afde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F5 10724 bytes
SHA-256: 6dfdea7b97697c7044c29ad4155dd0b8bb9e5c7a73c2f71f47e4b8582dbf2ad3
font_02_sfnt_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 14300 bytes
SHA-256: 6c6e394f6c3b8bf9c13e18561b45640deba875dce8d2a2855a9d2c3b9c9116cb

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