Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdc81dc425ce3df…

MALICIOUS

PDF

71.4 KB Created: 2021-10-06 07:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7bf6fa4e1ff018a43fbb9731f3159c43 SHA-1: abf14b01d78ada024451df7dab35aabdf50d65cf SHA-256: 6fdc81dc425ce3df24b604696b9da7725ca818359926a0399031e458261d51c4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external PDFs hosted on various domains, many of which are identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://franciscovalles.comtraining.cl/userfiles/files/78362079718.pdf In PDF document text
    • http://maryalo.com/userData/board/file/bajobixejazeb.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/kejimisejasugawulaz.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/80486172440.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449f3d73326---75383547701.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/83629640940.pdfIn PDF document text
    • http://labradory.pl/file/60124596235.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/be7ef362a4746e8d379bc9a3d139b277/rifoforabanumasowexabiru.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109141412271765.pdfIn PDF document text
    • http://onlinevay.com/upload/files/25769798307.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/nelitejazisitovomax.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/38966053623.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/18167612823.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/zazesopodafa.pdfIn PDF document text
    • http://koala-al.com/d/files/rulon.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/kerefosoxategafimajame.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/womejujamumuzegej.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/dojifejugakowojew.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/pavasatekibev.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/42834926794.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/woputimazod.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/30144687939.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/60127096414.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16331413193142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=synergism+meaning+in+englishPDF 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_off0000b172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB172 17820 bytes
SHA-256: 1c554f5c0df6c178e112c4daa55ce85c5090d53524ae064992597c58975211ff
font_01_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 10528 bytes
SHA-256: 433127ce6b01d3a96a73ac364152853cc23eb298513f142b3a9f5e3500139dcd
font_02_sfnt_off0000f80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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