Malicious PDF — malware analysis report

Static analysis result for SHA-256 e584a1d8bc6531c5…

MALICIOUS

PDF

107.5 KB Created: 2021-05-03 04:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ddcdbed022cec75aa65ce36ac6056aa1 SHA-1: fdd8a5f8e652085aaf34f773fe12205cd434a157 SHA-256: e584a1d8bc6531c566d59151be760e093e98e10dcb0ed71a5207704c6057f68f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one prominent external URI that appears to be a lure for 'data mining definition'. The presence of these links and the heuristic indicating a link farm suggest the primary purpose is to redirect users to malicious sites for phishing or further malware delivery.

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://golowaki.ru/strik?utm_term=data+mining+definition PDF link annotation
    • http://cabinetshub.xyz/xevulozamutonogojotyzlx.pdfIn PDF document text
    • http://nemekarasika.iblogger.org/multiplication_worksheets_grade_3_2_s.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/jiakkgd/16724937532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_6030177dccba1.pdfIn PDF document text
    • http://huseyincanx.com/setuwifedowimabdyi5s.pdfIn PDF document text
    • http://50offstore.info/what_does_full_service_mean_at_a_gas_station0snfp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499299/normal_603276ea0add8.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_60371b3ea7804.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fed52e8dd491.pdfIn PDF document text
    • http://rameduliru.iblogger.org/49868957272.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/jazuravazaguz/tofopodilamuwonopawariral.pdfIn PDF document text
    • http://jupuzagap.rf.gd/49647599021.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_5003d69c98ce465b9fd1a6a0877a5b9a.pdf?index=trueIn PDF document text
    • http://rebipilu.epizy.com/what_is_the_importance_of_marbury_v_madison_and_mcculloch_v_maryland.pdfIn PDF document text
    • https://f1fb087f-5d49-4061-aa02-230b108315d3.filesusr.com/ugd/645068_45c6325213b54b1b87d63c2eacf9603b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/assassins_creed_brotherhood_glyph_vaticano_district.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_b2496d6fa46d4036ac383b8c1a3bfee9.pdf?index=trueIn 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_off000166b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166B9 4920 bytes
SHA-256: f19f7d384cef7f050bf6659f0cca36d53c3fbc2afd29cd189050a3de53f38715
font_01_sfnt_off00017776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17776 12424 bytes
SHA-256: ffd84273e6b5a4f28362a16e83ee3013431502afffbb9decae0ca99dda301d3e

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