Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba33fbc5497f46cc…

MALICIOUS

PDF

77.4 KB Created: 2021-02-26 12:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: deac274c0fd6ece9169747bccd709147 SHA-1: dc4163f5067ed5dc8125e1699b00ce8b1d547cd2 SHA-256: ba33fbc5497f46cc669c2cc0f148c5b9b62dcc05b4898a478bae4c2371186028
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://seumenha.ru/123?utm_term=are+hyundai+sonatas+expensive+to+fix PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424029/normal_6008f99805163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_6031ec111cacc.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/kajuxedagudakapugikeduf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480895/normal_60332c4d888e1.pdfIn PDF document text
    • https://cdn.sqhk.co/pavupaken/ijLgfDb/skin_tone_shades.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/F6hhNmz/claw_game_master.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417406/normal_600267c5bf3ab.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/deriluduxobogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_6014143613a2d.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/ifPijua/blood_pressure_meds_that_don_t_cause_coughing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_6028ef10f4215.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/oZijYij/hide_tower_speakers_in_wall.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5ff4135181742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5ffecefa507b4.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/tabla_periodica_nacionalidad.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/rheem_electric_hot_water_tank_prices.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://wenares.myartsonline.com/22266249149.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/export_dynamic_html_table_to_excel_php.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/what_base_do_navy_seals_train_at.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_off0000e44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44F 5196 bytes
SHA-256: 8a083698da80718fb001691f71c08b29b95885784834aa33c5afd83f6f6a1c36
font_01_sfnt_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 10612 bytes
SHA-256: 78ec4d689379dd6121b8dbebea857d45e2e5ff1e89f5724c6de459041d8b07f0
font_02_sfnt_off00011a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.