Malicious PDF — malware analysis report

Static analysis result for SHA-256 0993662f5552ff3e…

MALICIOUS

PDF

79.8 KB Created: 2021-09-18 14:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd3dc7060a4df785ba6becbdd0ea58ee SHA-1: 2d5a6c2e8a3d330ba38bd6fed1d0d23e6eb77ee6 SHA-256: 0993662f5552ff3eaca7dc653930999783430b7fd2b113319334c9bda93ae3b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://prospr.fr/ckfinder/userfiles/files/tifemikuzamipe.pdf In PDF document text
    • https://wrd13.com/force/file/bawagivunibofupu.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/xutenonojekoladejegi.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/xejakavur.pdfIn PDF document text
    • http://jump360.co/upload/files/20210903121114.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/19731859191.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/xopilusobekopuduxijogu.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/43988169907.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/lurosopifim.pdfIn PDF document text
    • http://araonline.hu/uploads/file/tulewesunajedul.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/a5bcf16edb5396383c3b5b1588db6eb2/firisaseki.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/08/62341685565.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141385d10ade---9421126650.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/sofinusetiluvafenibel.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210902_7D177C7A0F7DB79F.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/zejakinixexu.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/22269680766.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/wiwisada.pdfIn PDF document text
    • http://rem-stroymont.ru/img/file/liluwanefufafepokolu.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/84102683526.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/pulamekeduzok.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/66529074642.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210904125809.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=free+skin+fortnite+ps4+generatorPDF 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_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 17392 bytes
SHA-256: 09fb7fd33b50b0c5e6585a517ac99178f13c7e7aa9b534df1e60e226fa843868
font_01_sfnt_off0001009b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 10636 bytes
SHA-256: f0094a8717d78f668090180da2054284056e067e090edfee16f47df414fc0764
font_02_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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