Malicious PDF — malware analysis report

Static analysis result for SHA-256 886872e39bd8c866…

MALICIOUS

PDF

78.2 KB Created: 2021-03-03 00:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a22ad2305363f64c1734ed79915c210 SHA-1: 908061b218860433c1de1786f4ddc37d4823b920 SHA-256: 886872e39bd8c866dd69699d3f17334fbce924d2099603d8c17fa0c5d6ff1dc5
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://xezojetit.ru/strik?utm_term=japanese+cookbooks+in+english PDF link annotation
    • http://13millions-warzone.store/carena_kobbe_lux_manualdgosv.pdfIn PDF document text
    • http://buybritishcat.com/dokavejo0nlub.pdfIn PDF document text
    • http://lnstagramoriginal.com/topakagikaluxakm264z.pdfIn PDF document text
    • http://kindraretterath.com/99037464910g1t4h.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/how_to_do_a_test_order_on_wix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_602fc8d8edb7d.pdfIn PDF document text
    • http://fanexaxujuto.22web.org/3_frame_html_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_60207db370562.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://batogejupimole.rf.gd/75474451052.pdfIn PDF document text
    • http://tatasuvuputo.epizy.com/69913247365.pdfIn PDF document text
    • http://xuwunokebisul.rf.gd/58471512014.pdfIn PDF document text
    • http://dufupukisamu.epizy.com/82502888809.pdfIn PDF document text
    • http://tijopuzotozume.rf.gd/sizorigubulalaxiwamu.pdfIn PDF document text
    • http://ninovaxabax.epizy.com/end_of_year_teacher_report_card_comments.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_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 5000 bytes
SHA-256: c0874b8a7af2e122cb19a7bfca521ee56e4fcbdb7025ac0d9c8d00a1eae4eeae
font_01_sfnt_off0000f766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF766 11436 bytes
SHA-256: 7df3e13ca3c9cba7bf994998d8ca91a2ca2bc6672c9002156aa205593934fd04
font_02_sfnt_off00011e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E44 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e