Malicious PDF — malware analysis report

Static analysis result for SHA-256 f094b3088a51b00e…

MALICIOUS

PDF

68.7 KB Created: 2021-09-20 19:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 484cae32e9df3b203d9c3e436c7019a0 SHA-1: 3ecddb8d380a17d9c0d9043d7883a9cc1cc51a6c SHA-256: f094b3088a51b00e60c72bfc345b74fd9e103064921d88e3f26c5b43babebf0d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the PDF's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://nuestratierrapremios.com/campannas/file/94504063337.pdf In PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/75439163885.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///vutanan.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bt8618pic32evdrukpkj9rqg9/89979754798.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/defami.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/wuvubafagobekokenojifuge.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210903183316227.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/lewerepufir.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/gapilegekasujefo.pdfIn PDF document text
    • http://www.como-grup.ro/fisiere/file/tukibujidemefodewopiv.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/fuvuvifaxox.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/99666287209.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/84038297259.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/480094930.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210920100702.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/98410601240.pdfIn PDF document text
    • http://gaudi.tw/upload/files/21343180394.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/tugorejove.pdfIn PDF document text
    • https://aksusu.com/upload/files/49934590690.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16147d06117989---35595701951.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/85639172131.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/fimamage.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/sutifarilexilinaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ld+player+pubgPDF 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_off0000b00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00C 10296 bytes
SHA-256: eca9b43278099ec2dfde35b2383fc32d4e7b0b048e742b907ab3ff82960184e9
font_01_sfnt_off0000c6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E7 15364 bytes
SHA-256: 71cf0fcc09e64e4cf58caeca9f9446185bb00b4dc56254f6cffa35602a35a690
font_02_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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