Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1fa1eaf980acfe…

MALICIOUS

PDF

75.5 KB Created: 2021-06-01 06:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1a20150a1a9338932ed2ae919d7d204d SHA-1: fbf8304e900206ea529e6b72c534ca5bc6a720ea SHA-256: 9d1fa1eaf980acfe82fbf6361e25282b63ecd6e98ad1e7aacdeb936e5402ce83
126 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. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to 'garageband iphone' to entice clicks on these malicious links. The presence of multiple external URIs and the link farm heuristic strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • 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://synerhu.ru/pbw?utm_term=how+to+add+a+song+into+garageband+iphone PDF link annotation
    • https://kufesivewafe.weebly.com/uploads/1/3/1/3/131384244/534937c5c5caeea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417809/normal_606dfb7a3b99c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5ffe1147c5604.pdfIn PDF document text
    • https://sakurulemiba.weebly.com/uploads/1/3/0/9/130969926/2217188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_603350ac7c2a3.pdfIn PDF document text
    • https://dafavazama.weebly.com/uploads/1/3/4/8/134893815/puxaj_vujilekegawur_bovutozareju_vopanavo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417806/normal_5fe0a6c4a3505.pdfIn PDF document text
    • https://paguzijap.weebly.com/uploads/1/3/1/4/131453408/munedulujiduzab_vadilofesom_mosumures.pdfIn PDF document text
    • https://jadozuvar.weebly.com/uploads/1/3/5/3/135312187/manejarupuxotivasep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371536/normal_6009a66fb9ca2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144411858/troy_bilt_5500_watt_generator_troubleshooting.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418632/jivuvajiwupozisotix.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/how_to_trickle_charge_a_motorcycle_battery.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/damozogitavapufoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd41d9d5-83a4-40c3-ad7a-f52933b0021d/fuwusozimifomapuxufa.pdfIn PDF document text
    • http://dejimebez.pbworks.com/f/98761079154.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/f/tasilisotetovafa.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/ikea_luroy_full_bed_frame_instructions.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144415128/how_to_run_originality_report_in_google_classroom_as_a_teacher.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/60703535781.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/basic_audio_amplifier_circuit_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc563e53-7f59-469a-bb3d-b4f64b5e2306/college_board_sat_math_practice_test.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144443337/bajirao_mastani_movie_download_bluray_1080p.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/6667158432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b071ec62-bf3a-4c57-b1bc-69a97b58a5f8/fujijazamelosufozekidub.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/define_elan_in_a_sentence.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_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 5380 bytes
SHA-256: bfd1688869e6f0a9df325f48b22de95aa378d02d6ab69e176926d8bcf9b071e6
font_01_sfnt_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 10724 bytes
SHA-256: fe00e8a5c705dd7e4a7fd04206ecd1d64d543bf5be53e391d867048cf8bfc91b