Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f11f3bc4b8f27a5…

MALICIOUS

PDF

83.2 KB Created: 2021-09-07 06:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4713845772fbe81b9a6e65be36daacc8 SHA-1: c78b6dfffd55cc599e046ea72724520c4063333c SHA-256: 0f11f3bc4b8f27a58fffbec32e34aa007d0fd98ef8b67fd3add3a246d2e73a00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, many hosted on compromised CMS platforms. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://insights3.com/wp-content/plugins/super-forms/uploads/php/files/fd46cce48e0028a912c97218a0666a62/xanavilajizos.pdf In PDF document text
    • https://fid-data.fr/app/webroot/uploaderfiles/vujusukudewarew.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/lukexa.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/82334906112.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4171fbfcee---76029881177.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a261c3e53c2---wetorulevegasogenefix.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608f15e67aee3---jazutiz.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd872a0e0e---9764294268.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/rarasisumikakamudoviwizi.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/39899695613.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/56841189979.pdfIn PDF document text
    • https://digireg.org/upload/mexugokat.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/lisosufewu.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/03ec50e83445dd10250c58d044940e05/dofanejenanegujunekedojub.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/08/29/file/70302619243.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/25620728843.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078ec8d6a7cb---relibekopekel.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/51707946909.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/44539438380.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/1630268472.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/sawalajowerekegetared.pdfIn PDF document text
    • https://lasanisports.com/files/velajosafuzuluf.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce76d934d29---biwejawuf.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/kiraxukubinukolasar.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/xagak.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1aa1df33ad2eef60dad60ad8f1b145de/72524196299.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=messe+dieu+est+amour+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_off0000daca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 10600 bytes
SHA-256: a3f7c2b86341d46d3496778aacdba3a3233de7ce4dbd1a2d0924a68a41b6aa0c
font_02_sfnt_off00010b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B20 20648 bytes
SHA-256: 1cb8e48ab56c2598ae66cf696358a5b60a4af42ba98ae1a5130284312ea6c78e

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