Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d86edc5384401b…

MALICIOUS

PDF

73.8 KB Created: 2021-09-20 14:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d97f3f184799bd14a2bc456d09eae9e5 SHA-1: 2767be8f57c618b944d9cb26d3c646267d6f8bff SHA-256: f7d86edc5384401bad51d2a279575cbffde02be2e7b200576f775cca15a7a455
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm with numerous URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting a phishing or malware distribution scheme. The embedded content, though obfuscated, likely facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://mutamobilya.com/images_upload/files/76116978252.pdf In PDF document text
    • https://rafaela-motores.com/userfiles/file/tidaguxo.pdfIn PDF document text
    • http://steinemann-ag.ru/sevurimodazowedejij.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/tajubibije.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/88652142192.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/dasokakifini.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/komusigasajupatabofubidi.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/16336973742.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138b7661a01f---jidevukivegiso.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/jifadimufiduvuwavudavup.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/lopemuvo.pdfIn PDF document text
    • https://onecre.com/images/content/files/35844097156.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1a2ab7974---piredozokuk.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/45296550933.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/20112174714.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/dabojap.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/sawaxofoxuwidon.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161483ea8d48d6---30954452095.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/88764825433.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/93935572201.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/gojujagatajaramafidosal.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/70573447200.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/ruwuxade.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/51689626016.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/komosobiduzasuta.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/rogifirerunede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=never+back+down+putlockerPDF 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_off0000bf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72C 16256 bytes
SHA-256: 92e9603c1ef93b13ba40c7e66f76d018f8ad695510bb2b83158734de6e99ca76
font_02_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 10708 bytes
SHA-256: 4f32bb56c23750406f34b5b8554b233f068be8e9529da171bdc0c2ba4da10e25

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