Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c45db8e38589780…

MALICIOUS

PDF

81.1 KB Created: 2021-04-19 16:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f9640b7fa046420cced20c9d45505ea7 SHA-1: 2bab3c60e5ea331b034a3b8590b8e06384945027 SHA-256: 6c45db8e385897803fcd8740bdf03f82aad9fb5faae6521301c698c4c2470215
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://dugedepap.ru/strik?utm_term=baby+girl+names+starting+with+ga+in+sanskrit', being flagged as unknown reputation and potentially part of a link farm. The document body, though heavily obfuscated, suggests a lure related to 'baby girl names', aiming to trick users into clicking malicious links.

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://dugedepap.ru/strik?utm_term=baby+girl+names+starting+with+ga+in+sanskrit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463543/normal_603e7928ef2c5.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/xezefazejuxajatefokev.pdfIn PDF document text
    • https://mepovokure.weebly.com/uploads/1/3/0/9/130969824/2243f4cc1b75e74.pdfIn PDF document text
    • http://idealica-italiaoficial.site/theocratic_ministry_school_software_macwxnpx.pdfIn PDF document text
    • http://meblik.su/julian_date_calendar_non_leap_yearblhx2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443595/normal_5fdeab80e03f8.pdfIn PDF document text
    • https://nutomejeti.weebly.com/uploads/1/3/4/7/134702699/janovedojuzep_wefimukuxuv.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/ley_de_la_administracion_publica_federal_2020.pdfIn PDF document text
    • http://nudistoff.club/how_to_use_mares_quad_dive_computeruop32.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/d3b8d4acd.pdfIn PDF document text
    • https://wipedevibenisi.weebly.com/uploads/1/3/5/3/135315865/jejepobilit_jamoniwes_kosuk.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/arnold_ehret_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://makikorulefo.rf.gd/ubqari_magazine_may_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15246bae-1d7f-4228-be24-4d8583ab1592/44757726764.pdfIn PDF document text
    • http://gokakotafabap.rf.gd/breadboard_basics_series_and_parallel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e534f9c2-74bc-43ec-ba4b-a2c30c1d27e6/brother_hl-6180dw_service_manual.pdfIn PDF document text
    • http://luwusifijusu.rf.gd/13460518641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea6539f-0a26-4d6a-85a9-534d918f6674/10211408804.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_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 5544 bytes
SHA-256: 8d94abefa8c5eafb347fc1a9d4888942b545b846eeef616adc2b718ab7b01f35
font_01_sfnt_off000111d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D3 11000 bytes
SHA-256: 6de17314d4eca48fa22b7cfdd18701f9346436413903bdcacd7ba0deabc8e9a0

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