Malicious PDF — malware analysis report

Static analysis result for SHA-256 772a7a3f88f296e6…

MALICIOUS

PDF

113.3 KB Created: 2021-07-18 03:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d19b13ebd50ae707a92362719da3fdac SHA-1: c92ce7db2f8396ebd82fd82522ce56147500b92f SHA-256: 772a7a3f88f296e692297d579bfc6c706bfb431d2e53223c89f38d7d683d95cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites and disposable hosting. The presence of these links suggests an attempt to direct users to malicious content or phishing pages, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/81213ae36314408f7be52173f8c1f9b4/nexubefavovubozipoke.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b1de65cacdf---8328155448.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/lvov8rcfn3m3bn8neb19rtc0u2/2581345821.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606f257ae3384---76506872903.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/25538907945.pdfIn PDF document text
    • http://momsystem.ru/public/file/pozadiso.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/93709539937.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804eb7f0249---nosexa.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/jqa9v0ap9fr1gntho1sqac97km/77032796843.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd81b1de3---56900240439.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ba790ff1d0fd3e52a986f0830f398ee7/zibomolodovepusunipalek.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/40863261560.pdfIn PDF document text
    • http://www.rotudavid.com/ckfinder/userfiles/files/32718619134.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/vizemenelamexuxud.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/i9fj4neogbf2e035t0e99snidc/jusudu.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/lepeterikaxijorawarim.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b292088b0ac---19293237694.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/17163637140.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/zibanaxarekowojo.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/10058955121.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/4093ca4273b077c2173a6781e8ca9fcf/77034075577.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/jivavatitexa.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/89813124303.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/dujapifukokufoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=alexander+the+great+hellenisticPDF 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_off00015c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8F 10612 bytes
SHA-256: 3e2b9a3251424840ae1f6da276f9d08124eb3296482154cefae8c2680d2a46b8
font_01_sfnt_off00017488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17488 16772 bytes
SHA-256: c4e7aca24d27b203c2f1967f3a6f0fa9922419aa3df782f231b89f364a893e8c
font_02_sfnt_off00019f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1