Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf3f70899ec69f6…

MALICIOUS

PDF

78.9 KB Created: 2021-03-03 19:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c134a092ff607df6f3dd39d2e6f74e2d SHA-1: 72264b21831b428e3661e1da61d14d45ea56d4fd SHA-256: 1cf3f70899ec69f6b4f42a90ffbe9214fe1ecee4b281451a54f66543974b3737
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or scam attempt. The document body, though heavily corrupted, appears to be a lure related to search results, further supporting the phishing attack pattern.

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://jottigo.ru/wix?keyword=animal+cell+coloring+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/ribafesupuro/tiijcjf/uggs_bailey_bow_black_friday_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/giBUrgj/92961510618.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/ljaSeig/banefutovipudopoze.pdfIn PDF document text
    • http://womumonafip.22web.org/why_is_thomas_so_important_in_the_maze_runner.pdfIn PDF document text
    • https://cdn.sqhk.co/zozusexub/jbjbiaS/xiwusozamesam.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/ihgcCTD/chicken_pound_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/6PR3ieX/photo_editing_sparkle_effect.pdfIn PDF document text
    • http://fenopageliterow.iblogger.org/ameloblastoma_plexiforme_definicion.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/old_song_akhiyon_ke_jharokhon_se.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisiziwaros.epizy.com/chamma_chamma_video_song_in_1080p.pdfIn PDF document text
    • http://gatakokuto.rf.gd/samsung_galaxy_a50_android_10_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/17263085783.pdfIn PDF document text
    • http://pidivatepijalaw.epizy.com/42851627949.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/31243137615.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/automation_technology.pdfIn PDF document text
    • http://givudejefavapa.rf.gd/bollywood_box_office_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/lizamowefosorotebofo.pdfIn PDF document text
    • http://zadiriza.rf.gd/ratomex.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_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 5360 bytes
SHA-256: 55a3c56ec1472efa5cdca043c289d0698926f5f96b30e83fd1e090540d9777a5
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 10964 bytes
SHA-256: ea3febf1507f9ecbd6558d4e52e49351d9cb7aaa59248abc535b453b4fda326d

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