Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd475573c15e6cbd…

MALICIOUS

PDF

72.9 KB Created: 2021-02-12 12:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92f1693acb6664f0dd0ccd877dbac8f8 SHA-1: 4390adb3579241078b01e5b6b65e0308e8396aae SHA-256: bd475573c15e6cbd60d51725a1da18e7236cefbca703a7d127123e4bb214d330
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it's part of a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to obscure the true destination by using many disposable domains and link farms.

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 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://bologen.ru/wix?keyword=jonesville+middle+school+mi PDF link annotation
    • https://cdn.sqhk.co/simosukolevo/371g54v/91355254810.pdfIn PDF document text
    • http://gisisavodure.22web.org/vekasosumakujudep.pdfIn PDF document text
    • http://proita.space/lemonade_stand_song_2vxk15.pdfIn PDF document text
    • http://santecmb-sarl.com/14838152675loxxu.pdfIn PDF document text
    • http://hookup158.fun/jigazuwukisikomobiwina4zgpk.pdfIn PDF document text
    • http://zeraseb.66ghz.com/95464064696.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/nisonilutemadasidubotonpyurg.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/kojajeledisa.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/vji6gd0/french_vanilla_ice_cream_brands.pdfIn PDF document text
    • http://reawolt.online/standard_catalog_of_military_firearmqdrgq.pdfIn PDF document text
    • http://nat-yoga.space/john_deere_gator_parts_manualgfu94.pdfIn PDF document text
    • http://private-channel.site/96778344316eg7uy.pdfIn PDF document text
    • http://palitra-cveta.ru/duvisaxasejed15pt.pdfIn PDF document text
    • http://ujjjrrrrr.space/95317013992vm2sf.pdfIn PDF document text
    • http://dibuxovowo.iblogger.org/29033642800.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibipadesubamom.epizy.com/chrome_offline_installer_english.pdfIn PDF document text
    • http://xofafatererowu.rf.gd/70338845503.pdfIn PDF document text
    • http://nupuzasig.epizy.com/bombsquad_for_windows_10.pdfIn PDF document text
    • http://sepazebop.rf.gd/diablo_3_switch_kanai_s_cube_guide.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_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 4920 bytes
SHA-256: 8659058c6e379a789fac9ece403d38bc01b73f94a1248fed4008d3c29efd9a8f
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 10300 bytes
SHA-256: 3a0adf115143bd8a4c479e2405f571bdc881bae188957a24df0ba9cda6b0c1b1

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