Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde5854a4e88682b…

MALICIOUS

PDF

78.8 KB Created: 2021-03-06 14:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1df6317a202a48be27dc7b860e8f8140 SHA-1: 821d89f4a8cf3cac5a59f2ecf37e4a60dc71c16b SHA-256: fde5854a4e88682b379688412a9f283875fa890161dcdb6ae4bf1acae05326e4
156 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing for a PDF link farm, indicating it's designed to redirect users to external sites. The document body, though partially corrupted, suggests a lure related to 'how to use big green egg grill'. The presence of numerous external links, some with benign reputations and others unknown, points towards a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://fokemale.ru/wb?keyword=how%20to%20use%20big%20green%20egg%20grill PDF link annotation
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/zorubuga.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/cdd4ff3.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/f09ca7c8ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugojan.rf.gd/aalo_bengali_movie_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/vabexigilorutezimajobusu.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/sin_noticias_de_gurb_online.pdfIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_9575adeef39749898c1007510d5421d4.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_243c8a9606dd4c0e9b1fd216d2bc6501.pdf?index=trueIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_0029e390ca5d472f9ba12f848f1bcb07.pdf?index=trueIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_f424c2a4764d45a8a7fe58fccfbe973a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/pisagunadedam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531ba0f2-6010-4ed2-9e0a-2d16d4702349/dopetajemube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11613444-77dc-4d26-b79b-23dfeda7d465/how_to_make_a_d_and_d_character_sheet.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_caa0a6e1a69d475db45f25edecec4c7f.pdf?index=trueIn PDF document text
    • http://pujegadamuj.rf.gd/kuxaxapowibuwilujudokes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64345429-f285-4a6b-9fce-7f99c6863e5c/tomexen.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/java_xlsx_file_from_server.pdfIn PDF document text
    • http://bivuraxut.rf.gd/collage_maker_photo_app.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/free_booklet_design_templates_word.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 4836 bytes
SHA-256: 93cf3976fbb1361822a4228260062f2874a7e609fb18de2025ef120464d2a703
font_01_sfnt_off000108de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 11116 bytes
SHA-256: d210b317d5e198cc274be3a014f91b545a1322c180571bcbbf0d0ee3ed1f80d1

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