Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fd6c66acb74fea…

MALICIOUS

PDF

84.7 KB Created: 2021-10-07 14:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 0a6ccc1be01848a724000c8d10db7a55 SHA-1: 7b3f53c7996157af13f32710163f6a4774b293af SHA-256: 20fd6c66acb74feac442ef5ddc8c15a43b85b0c9e80ae2bcf24de28701ac1a89
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites. The PDF structure and embedded content are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=best+settings+for+pubg+xbox PDF link annotation
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/55790668154.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/26756672631.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/032b3b3c2e03e75973e9840983cb7867/sejajutitatelexiro.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/xifozudawetelibe.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/35030328412.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/15438653982.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/46055575756.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/muvosokopagamomezug.pdfIn PDF document text
    • http://mextro.de/upload/files/14356533016.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/92060375789.pdfIn PDF document text
    • https://web-idea.ro/app/webroot/files/userfiles/files/zigusetigufiwegibaxo.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/55339846403.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/rigisuvawixalivimorew.pdfIn PDF document text
    • https://ratosatu.com/contents/files/talerobugerizifov.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/sobavubanike.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/pofixixonas.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/jevuwoxasud.pdfIn PDF document text
    • http://groupkaishan.com/d/files/mitakerejurulu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/25163591190.pdfIn PDF document text
    • http://reylab.com/userfiles/file/tuxev.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/11671935870.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/zogekosag.pdfIn PDF document text
    • https://soechi.id/userfiles/file/jagurimigutama.pdfIn PDF document text
    • 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_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 19276 bytes
SHA-256: 89026ad596caa147f2cde1038ca12fda01b7a328ad5ba6c167ac034fdf613db4
font_01_sfnt_off00011511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11511 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D28 10720 bytes
SHA-256: 27cb183f0243a9fc0f5cdce8a9e29f4c09cf33ba20f358644fd4e956f066c7d8

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