Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd0c7bd19045aaa…

MALICIOUS

PDF

76.4 KB Created: 2021-02-21 16:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b330cccfb9318f1f7fb23f33423c5a5c SHA-1: 6083eaca5c378c869e51fcd94930d3fde78d6b81 SHA-256: 0bd0c7bd19045aaa6ef3e22f9b475cb64572a5bb6015b2861a2f89b88f9d06dc
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 0.9998

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://crophysi.ru/strik?utm_term=al+quran+with+bangla+pronunciation+and+meaning PDF link annotation
    • https://cdn.sqhk.co/lamiwifa/3Se2gdF/vmware_horizon_client_4._9_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/hj0nWeo/perfect_slices_fruit.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/bghQ2gg/ziboxixosupukusekosi.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/hfEigai/movies_on_netflix_october_2020_family.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/ijcT4df/field_navigator_app.pdfIn PDF document text
    • http://fiduvizowema.iblogger.org/wimud.pdfIn PDF document text
    • http://botojagi.iblogger.org/yiruma_kiss_the_rain_sheet.pdfIn PDF document text
    • http://zoziwasikow.22web.org/avadh_university_degree_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/jQhcihc/rapatusu.pdfIn PDF document text
    • http://yachts-4-sale.com/34313509804moz95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tetexamafikej.epizy.com/59317321942.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/android_tv_box_best_buy_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/fozabiwedopedi.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/australian_passport_renewal_application_form.pdfIn PDF document text
    • http://bevunogigofijag.rf.gd/sbi_online_application_form_challan.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/26873685544.pdfIn PDF document text
    • http://wuvesuwenelagaj.rf.gd/aldus_pagemaker_5._0_software.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/39462270718.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 5656 bytes
SHA-256: 081677d3102f1977073969c9382ab7c9d7e0ca7055ac0b978484f407890278f6
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 6144 bytes
SHA-256: 0171c72976a2b7d6353054b416cc43548801e1d5bc4ffa8c8d38a504c6ceaee7
font_02_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 11936 bytes
SHA-256: baef29843918b412b631719a243b190f520553e20cac7701f54505c0f8a4dca1