Malicious PDF — malware analysis report

Static analysis result for SHA-256 e040926726d5ff64…

MALICIOUS

PDF

79.9 KB Created: 2021-03-08 19:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d7c59415d0c27858ecd8eec7c6c294e SHA-1: 3d92ee977c53cc81344731f0190011768338e51c SHA-256: e040926726d5ff6472f17bf75ee67ac1f23777ac72127d834df1e5f503595c08
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 0.9991

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://baarspo.ru/wix?keyword=how+to+hack+csr+racing+2+android PDF link annotation
    • http://50offstore.info/hmdx_rave_bluetooth_speaker_pricetq70w.pdfIn PDF document text
    • http://premiumpornclips.com/circuitos_amplificadores_de_audio_para_armar4zlmo.pdfIn PDF document text
    • http://creditscoreusa.info/duzupuwuduruposejarfe6a.pdfIn PDF document text
    • http://appletopshop.ru/the_science_of_psychology_an_apprecictmkg.pdfIn PDF document text
    • http://biweekamnf.com/employee_absent_letter_format6m13i.pdfIn PDF document text
    • http://worldthailand.fun/57017218123nw1w9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381318/normal_5fcfb8118e8cf.pdfIn PDF document text
    • http://comforfemj.fun/fundamentals_of_logic_design_enhanced_7th_editionrm4gl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5ff5d0cd5823f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_6011e3d3e0897.pdfIn PDF document text
    • http://medicinfo.online/vetizakuguvoleg0febj.pdfIn PDF document text
    • http://123dutch.com/pasimesesilagmhp3p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448547/normal_60359be3505d4.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/74241203652e2r0t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421210/normal_5ff5ef0412f3c.pdfIn PDF document text
    • http://fuckfrsky.com/2015_chevy_spark_ls_manualg83y0.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/assassination_classroom_opening_songn12i8.pdfIn PDF document text
    • http://wowitaly.pro/how_to_get_imovie_94xf45.pdfIn PDF document text
    • http://waystep.site/gastropoda_lautpkhv1.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
    • https://uploads.strikinglycdn.com/files/6cf77099-16be-4d2e-af9a-b1b881fc5766/what_is_the_meaning_of_curriculum_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99355235-df33-4b19-86ff-01408f5311da/suzuki_sidekick_sport_lift_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03c575a-25f6-48f0-a399-40f02ef690ab/xetorujoravotux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc850d1-c542-46ad-8673-a27ca2d50bed/how_to_use_dyson_ball_multi_floor_2_attachments.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_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5088 bytes
SHA-256: 9c458f6e2f7d6fc009d9e07060ecbd2edae921ca919cf3ac1fdcc89dad5d0295
font_01_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 10500 bytes
SHA-256: 3f7dbe82a810a4be3a4c57274e2ba043eb2185b7f3832c2e1f1141ffaa02f60d
font_02_sfnt_off0001237c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e