Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b92b91d9538f25…

MALICIOUS

PDF

77.1 KB Created: 2021-06-06 21:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a0bd1f0a9fadfd05419b3bdc5caf128f SHA-1: 0acd2b84d6e6a3c344cc5d6457078eecef4b225a SHA-256: 89b92b91d9538f25b25fc9d820097ef541b65db49519320bf0d211a0044adb68
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crysiq.ru/pbw?utm_term=adanga+maru+hd+movie+download PDF link annotation
    • https://kivubuzer.weebly.com/uploads/1/3/5/3/135332577/0ad900.pdfIn PDF document text
    • https://sanevofodi.weebly.com/uploads/1/3/0/9/130969150/6175423.pdfIn PDF document text
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/wewugemuja.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/zixitimovisesup_zaxud.pdfIn PDF document text
    • https://nizawubanivud.weebly.com/uploads/1/3/4/5/134529200/7578813.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kejuziz.pbworks.com/f/jideretedo.pdfIn PDF document text
    • http://palejemevat.pbworks.com/f/31758645809.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/ratio_of_perimeter_and_area_of_similar_figures_worksheet_answers.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/watetesosagotofov.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144528672/7246515180.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/w/file/fetch/144507255/maytag_bravos_mct_dryer_manual.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144435111/savavede.pdfIn PDF document text
    • http://wepoline.pbworks.com/f/42437244214.pdfIn PDF document text
    • http://guleribiko.pbworks.com/f/where_is_book_of_enoch_referenced_in_bible.pdfIn PDF document text
    • http://povelin.pbworks.com/w/file/fetch/144422994/56787617088.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/lutekavalogalafapudi.pdfIn PDF document text
    • http://bekojifutok.pbworks.com/w/file/fetch/144739275/how_do_you_use_the_expectancy_theory_of_motivation_in_the_workplace.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/f/dls_2021_hack_profile.dat_file_download.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/f/35855801600.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144504204/capitalismo_x_socialismo_x_comunismo_x_anarquismo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EE 5004 bytes
SHA-256: 67264a9dbf46abf6f7da1d5d3a422a0dd76470d7f1b23c17c44e4ac9606697cd
font_01_sfnt_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 10732 bytes
SHA-256: 8164c393d876b6df9deab82a34d49f9f39c84ff6f2f57c0367a42e65c00a1b7d
font_02_sfnt_off00011950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11950 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378