Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bc158e06b135ea…

MALICIOUS

PDF

74.1 KB Created: 2021-04-02 03:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3476504f6a86345fbb4ecb2fb12afbfb SHA-1: c297c4cc93a3fd5d0939e5de6ab574bf2dae4847 SHA-256: e2bc158e06b135ea532dc50fc45128563d7fd8b37bfb649a5bf96b23267eade9
194 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute further malicious content. The presence of a 'download' button lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/aws?utm_term=autocad+3d+drawing+tutorial+free+download PDF link annotation
    • http://metarapuw.mypressonline.com/2919889563.pdfIn PDF document text
    • https://filalodov.weebly.com/uploads/1/3/4/6/134673241/zorefu.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/hfVe8ii/m25_traffic_rush_hour_times.pdfIn PDF document text
    • https://xodimazu.weebly.com/uploads/1/3/1/4/131408168/1438796.pdfIn PDF document text
    • https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/62f28.pdfIn PDF document text
    • http://optalpha.com/660910118852zlao.pdfIn PDF document text
    • https://cdn.sqhk.co/pudibamune/jDgf6ih/amaravathi_telugu_songs_free.pdfIn PDF document text
    • http://pet-guru.shop/english_grammar_rules_countable_and_uncountable_nounspyxlq.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/pijin_nizupexojusurum_xafudem_xemikipenonip.pdfIn PDF document text
    • https://navowilupaxit.weebly.com/uploads/1/3/1/3/131381067/darejopewomexibobaz.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/jVgikhj/xifovenolakibamen.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/j1aBgcr/28868244849.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijumomub/escmid_guidelines_clostridium.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/o_neill_forebay_fishing_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/dr_jekyll_and_mr_hyde_sparknotes_chapter_9.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_b8b93d2979b143dc9fb51155ce4082a9.pdf?index=trueIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_df3c54f2b4714c1abd470a30bb3a84c1.pdf?index=trueIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/lp_bronchopneumonia.pdfIn PDF document text
    • http://biburusig.myartsonline.com/fisaneras.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/94017320970.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/62614020393.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_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 5256 bytes
SHA-256: a056034bdca9fc00b2f1fb2bf7ad37a31f5ed8f926ca5eae193627ce3650bf88
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 10644 bytes
SHA-256: ef9794ed9f309225dc4cbca971159bcef7fa6563b32a12cb2911ec0755ad4f49