Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e95400a7fd41b7…

MALICIOUS

PDF

76.9 KB Created: 2021-02-21 13:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1202ca9d69cdb138b8f123f4afbbd4d4 SHA-1: a267061baabe11334d58c388a16f39dd8dfaae64 SHA-256: 45e95400a7fd41b7796143bacf19d64dcfb147024a24ff3d4f0cdc8f23096aa9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains and link farms, suggesting it's designed to redirect users to malicious content or phishing sites. The presence of external URIs and the link farm heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=bergeron+process+upsc PDF link annotation
    • http://robinmani.site/6578909594cupn0.pdfIn PDF document text
    • https://dimitosakusefix.weebly.com/uploads/1/3/4/6/134631941/nusex_pofidozamed_dijavuliguv_besimujuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5fe973bbb6147.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_5ff9f42bde0de.pdfIn PDF document text
    • https://lagomide.weebly.com/uploads/1/3/5/3/135304015/bigulerenubawam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_602d3e186962d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5fecb51dad664.pdfIn PDF document text
    • https://kolokizegilo.weebly.com/uploads/1/3/4/3/134370221/5527084.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/gfgdjiq/siberian_cat_for_sale_mn.pdfIn PDF document text
    • http://hookup682.site/tezinovogizu43pxg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405437/normal_60009402dd7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409607/normal_602fff3b3ee31.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/dcbf69175289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_6021291a7e181.pdfIn PDF document text
    • https://cdn.sqhk.co/lilanoto/hgCChbO/zawusonumetijilubavaw.pdfIn PDF document text
    • http://kfcrabota.ru/talk_to_me_in_korean_books_reviewt9nto.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/gg6gihh/rudodulukinakasuwuxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_6013b31555c46.pdfIn PDF document text
    • https://pedogore.weebly.com/uploads/1/3/2/8/132815008/a449f2d33eb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_5ff585f22cafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 4908 bytes
SHA-256: e2316ad0a0d36eddec307bfcd1edafdad60aff4196f1711272ef6d16485163f5
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 10308 bytes
SHA-256: a6843da1e5355195c1815fef97903a60f2e52b1434b5f7dc9d2791c1dd336409
font_02_sfnt_off0001112a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112A 16096 bytes
SHA-256: b81bd6dad15da1d34caef1519340d18a34796ec70328335d7cf798cc40c487ae

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