Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce2f7278f15a77f…

MALICIOUS

PDF

84.5 KB Created: 2021-03-15 11:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: cf550f6515daaa1fcedcb158e964bb35 SHA-1: 92eda630c622422394426d6c956b29b0402a2f77 SHA-256: bce2f7278f15a77fc7f86019d2b3c5f16949a2acb52bad0f7386cc2a60274285
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs, specifically one pointing to 'maypoin.ru', suggests an attempt to redirect the user to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting, commonly used for phishing or malware distribution. No scripts were extracted, but the overall structure and URL suggest a phishing or malware delivery attempt.

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 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://maypoin.ru/strik?utm_term=sloan+flushmate+installation+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5fc7bc1e4dc86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393353/normal_60057c9d9e5eb.pdfIn PDF document text
    • http://venolilixe.mygamesonline.org/todokofolevok.pdfIn PDF document text
    • http://bufezipuduxev.mywebcommunity.org/what_are_financial_tools_and_techniques.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
    • http://mukonedes.epizy.com/97530992556.pdfIn PDF document text
    • http://xinuxupenaze.epizy.com/annual_report_of_reliance_2017-_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6769739-bfe4-44db-9a58-464d141e776b/bonafivezunuxajikavamipag.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/fixuxogovesozutizu.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/cyberpunk_2077_johnny_silverhand_gun_console_command.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0280e22-60ed-4140-892f-ceb982d258f2/94788802573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d729191f-518f-459b-ab78-0d3528cd9c6a/ansys_ls-dyna_users_guide.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/modern_age_of_english_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/annamayya_movie_free_songs.pdfIn PDF document text
    • http://duziroro.myartsonline.com/sears_kenmore_sewing_machine_parts_diagram.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/mepive.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/larupufarawenumezunijisep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea387d8-07c8-4ee9-aa14-3d661a5fc9f9/1034779924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fc08f6-ed7d-4aef-919f-8ccf7bca8f8b/24969867432.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_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 5104 bytes
SHA-256: 2b4ae6ce06ee2929223511ece9d0ee272e2a6c6947ac09c3b54a27150930878b
font_01_sfnt_off000110f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F1 10900 bytes
SHA-256: 1dc3694fab3398f8ffcd15ec6abbc250f3de46606d1c1dc4a3a5788865fac17f
font_02_sfnt_off0001364a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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