Malicious PDF — malware analysis report

Static analysis result for SHA-256 4874f62233c5293c…

MALICIOUS

PDF

61.1 KB Created: 2021-02-20 05:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b78f06bd4b0206515a5b42293931548 SHA-1: 74d4a2bddf09e3efd109a05627b3055c28422ad8 SHA-256: 4874f62233c5293cf90dfadd1ffca258792f6f9a2899f90d3d81745c1c74f563
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/strik?utm_term=la+biblia+catolica+completa+para+leer PDF link annotation
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/1b650f3126cdcba.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/d59c4ed4.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/hfG3R5c/68821212918.pdfIn PDF document text
    • https://vawalebadafi.weebly.com/uploads/1/3/4/6/134660315/c7a67.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/dSthab8/my_ee_top_up_voucher_won_t_work.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/a3yjgib/94259195286.pdfIn PDF document text
    • https://cdn.sqhk.co/nezupusovefi/ChcC4Y7/bomber_friends_apk_mod_money.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/8779645.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/hgeuul8/bts_idol_call_youtube_views_deleted.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/thjid9m/most_popular_tik_tok_dance_music.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/bngdDhi/draw_joust_game_hack.pdfIn PDF document text
    • https://rugalasaludazi.weebly.com/uploads/1/3/4/6/134683923/geripo_juzusil_pexudinagigipej.pdfIn PDF document text
    • https://cdn.sqhk.co/fopajuxalaso/he9Tqgi/mermaid_vs_princess_dress_up_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/ifp2hds/91850963076.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/ac88b0db65964f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ledaxefamadore.epizy.com/bofore.pdfIn PDF document text
    • http://totiwofosu.epizy.com/merge_excel_files_in_one_sheet_vba.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_off0000b242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB242 4980 bytes
SHA-256: b25df5d775f1f6e9057c11911469119eb0d61a5eb14dd8fac2798e1a39a07839
font_01_sfnt_off0000c31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31A 10592 bytes
SHA-256: ea15ce2ce7c5040d97db2578821be2fbd843d3e8517975c1bdbc47084f4ca0a5

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