Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e694d95a2157200…

MALICIOUS

PDF

85.8 KB Created: 2021-08-29 20:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cdeca6b0a5f8cc54cd74fcfce01bfeb8 SHA-1: a94beb60824dcf83e45e8782e8a3431c887cb66a SHA-256: 7e694d95a2157200e9ad4b5c95b8f28c39e7b9aac91c0d3c735c69d69ec6ab06
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://mojer.bg/files/98455963545.pdf In PDF document text
    • http://qazaqbanki.kz/data/content/files/35315715941.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/21ov43fv9fr702ob5nqfdesvf3/butojomotasikeparazipul.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/9e85229220d7071bc46ffebe0c8db101/zizogo.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/67b4a4a0d4ad3fcf58763d6d50e2dbc5/zemaxewanepadunepinil.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/35125158706.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/46299888600.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/2701840161.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/4309842987.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079225b5097f---89225470138.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/tifamag.pdfIn PDF document text
    • https://biomisszio.hu/tmp/duwisituwemiso.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/kimozidutobipuf.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210724225814.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceac494524---54519372282.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/a9kbi8nr4kgbhe84verdph5si0/75649932772.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/wuzakufivoti.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/5357893026.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/75672447423.pdfIn PDF document text
    • https://securitydm.com/slicice/file/zasofo.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/vugari.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/poguludujokosedigorozigu.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/kivulinuxokisus.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/69887172830.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1h7bemrcq7pb0nrrdhfvagl43/bewinamaror.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=math+in+the+real+world+articlesPDF 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_off0000ea31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 17968 bytes
SHA-256: 8e175472fc6300014edd4a08ef952094f068915278edd2e0ca661c640e505666
font_01_sfnt_off00011897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11897 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AE 10548 bytes
SHA-256: 9f05a0cd0d1b7a9fa80615dd4fb33e08a174e9562850870f9ad06b482cbcaaef