Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b702f4db98d6f8f…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 07:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac109ca2dc666bad41b0de9758776a2b SHA-1: e5a1ac7db0507db1c8997d2fef9f8569ea27347f SHA-256: 3b702f4db98d6f8fc43af58467c9ad4e422c1006205c5d4fee46e293d01730fd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or sites hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to act as a link farm, potentially to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://jfhcoaching.com/userfiles/files/tomekilidulat.pdf In PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/cb691cade09ef59b61e6dfa9b9919d30/4168806824.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/it082agkj9gc39ail66k3v6990/xudukipipixubedixeguluw.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/56262220393.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/fumaxugetegazoderadu.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/gusonoxokotugoladusu.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/47357246857.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/jurefunomizepibutorigidip.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/62d8b35e7d152f06dd60d0143ce8abe1/30520741444.pdfIn PDF document text
    • https://dintek.eu/uploads/file/zopezibokazebevelup.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/jakojimus.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/46131242794.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/21209391100.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/93827384616.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa2fe450ae3---rowokofubexewinuzev.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/moralepolemar.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d47249ec4dc3f384a8378dba616618d0/takipelirudak.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce9ccf044f---14801895215.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/jasawosinifawavirel.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/nifewinunurifagitadiwox.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/fupigusaluxawa.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/dupowowomebuzi.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/36609631718.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/231520cd4db87bf1b2e17d2d9bfa5e52/44114815646.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=communication+research+methods+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_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 17044 bytes
SHA-256: d044dbaa623887a512fbe35a7caa0518182924220395855a814e684d60454116
font_02_sfnt_off000126b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B1 10972 bytes
SHA-256: 503d1e9037a200afabd81e6378d968769f4478adb3080e5365cb2687368aa5a1

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