Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4e87b4cec7b8d5…

MALICIOUS

PDF

140.2 KB Created: 2021-03-05 04:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c52a9bfcb33e1e2b5cdba8dcda2970c9 SHA-1: a25754818d039f5be4722cd55cf8d81879253e3d SHA-256: bd4e87b4cec7b8d5652161c5a545c9d1dabb7d2c0ab2206399cb751a60489883
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains text related to search terms and application metadata, suggesting a lure to external content. The presence of embedded URLs pointing to potentially malicious domains reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/award?keyword=unfettered+meaning+in+hindi PDF link annotation
    • http://kixurox.getenjoyment.net/jedipiweke.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/confidence_fitness_magnetic_manual_treadmill_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/hi68ucw/monitowuvamuga.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/SzjcheK/scary_teacher_video_call_chat_simulator_prank.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/Whh7hfg/nanuwimowa.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/what_does_bible_say_about_marriage_after_divorce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6b1c0e-46e1-4e39-8e46-4370b9290126/kofas.pdfIn PDF document text
    • http://jodamedorofile.epizy.com/xemuvejuvafe.pdfIn PDF document text
    • http://ratimoli.epizy.com/vanenesefomubirodu.pdfIn PDF document text
    • http://zupotid.epizy.com/bamofarivobukipizume.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/63317912316.pdfIn PDF document text
    • http://famofuviw.epizy.com/foxit_editor_with_crack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/61435118450.pdfIn PDF document text
    • http://xovimed.rf.gd/descendants_3_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/ruzupo.pdfIn PDF document text
    • http://nuvotadaxiti.epizy.com/vemabikaxujame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41db4fc-54e0-4f56-83f8-e3c6b65aaf2b/how_to_install_uppababy_vista_infant_snug_seat.pdfIn PDF document text
    • http://pebafuduzuxifa.rf.gd/bd_chaurasia_anatomy.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/how_to_program_comcast_remote_to_my_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/cs221_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/21865364276.pdfIn PDF document text
    • http://tuludad.rf.gd/13439359385.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_off0001ed7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED7E 5100 bytes
SHA-256: bd38cd03eceec9d928d1aa401013cba41dbd3d56245dd138067bb8c338dbcc23
font_01_sfnt_off0001feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEAF 10752 bytes
SHA-256: 3f7e9afe36c119ef82d05b8196926107660b6f683d54da677631135e04a13df0

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