Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2518e97bf4af42…

MALICIOUS

PDF

81.1 KB Created: 2021-03-19 08:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5c55e935a2d7a447c38a347d70b6028d SHA-1: 9ba1b7c4d9c3c0e467dbf182e04febe8e83319e4 SHA-256: 5f2518e97bf4af4209cd6985816e03a7f68d55e63107af9e586a9c28a5d2a82d
156 Risk Score

Malware Insights

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

This PDF contains a large number of external links, a common tactic for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=honda+eu3000is+price PDF link annotation
    • https://cdn.sqhk.co/xupotuferu/BehaEPb/1485507611.pdfIn PDF document text
    • http://keep-travel.com/sawibeji1tfq9.pdfIn PDF document text
    • http://topcreditcheck.info/sizupanozipilt72mz.pdfIn PDF document text
    • https://cdn.sqhk.co/pamomusemida/JIs2gfR/inscribed_polygons_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_a97ffb8846a3496393e4a6eae972a6aa.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_5eacea41d3134e40a8a45dc2fb01b222.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_9e24eb1ac7c4464cb3724251964e8613.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c131291-f961-44ab-81de-06262efb129b/popenuwulepudijubawanij.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_378cc6f33dc8426fa9a8481ac3aaf004.pdf?index=trueIn PDF document text
    • https://b760d8db-9746-4821-aa2b-94c9f806d328.filesusr.com/ugd/26ce45_f7b18982a76d49bda3fca0abe88af7c4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavalukato/rupinder_gandhi_2_full_movie_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16fc8b85-dfc7-47c7-aa2e-af69ee73dc87/23298598164.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/embroidery_machine_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/64884750125.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/english_conversation_practice_by_grant_taylor_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/68747759064.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/three_billy_goats_gruff_story_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15a7459-f224-4a14-be9e-59cbe6de1fe9/8441787317.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 5104 bytes
SHA-256: f4351de5cba3c442e8aadb6523dd6a71b0887374ea71379a762a3197c95380cc
font_01_sfnt_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 10776 bytes
SHA-256: db4521d9ef7d2a9ff6966a3846850dc0c3dcd9dacab54817389867a4b7e0f615
font_02_sfnt_off000128fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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