Malicious PDF — malware analysis report

Static analysis result for SHA-256 6198ec17be825935…

MALICIOUS

PDF

86.6 KB Created: 2021-03-20 07:30:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec4b7a24ff280d043d9a07c071faaa69 SHA-1: 924273419e5ed12a336b0571a212f769dee59a7f SHA-256: 6198ec17be825935b13405fb0be6d94e60e5b403260895c37c29e86480a74e00
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 0.9995

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://fokemale.ru/award?keyword=rental+application+form+pdf+fillable PDF link annotation
    • https://cdn.sqhk.co/jufenakajo/gTgj3gg/video_game_design_foundations_software_design_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/UihPhfp/memes_wars_multiplayer_sandbox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464707/normal_5ffa25e1e46a0.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/49oE3ym/rubber_chicken_song_bad_guy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_600f47f58aad1.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/ghieuTQ/furious_payback_racing_unlimited_money_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_601dcb4b3290a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_5fe8f0fa234a6.pdfIn PDF document text
    • https://cdn.sqhk.co/tixaxelubigi/gihhgut/ziregazokanutoxab.pdfIn PDF document text
    • http://wisevajiliji.22web.org/jolene_ray_lamontagne_piano_sheet_music.pdfIn PDF document text
    • http://linorusani.iblogger.org/tales_of_a_fourth_grade_nothing_summary_chapter_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5fce95426179d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389366/normal_5fdf7e8d36f86.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://s3.amazonaws.com/tidigudetefumof/south_carolina_2018_football_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/email_newsletter_design_templates.pdfIn PDF document text
    • http://kobaguwo.epizy.com/61057281804.pdfIn PDF document text
    • http://navozilapeso.epizy.com/gone_with_the_wind_sequel_dvd.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/60546975029.pdfIn PDF document text
    • http://zazigaxurude.epizy.com/active_tcl_tutorial.pdfIn PDF document text
    • http://lifukifeja.epizy.com/westinghouse_double_outlet_timer_instructions.pdfIn PDF document text
    • http://zoxejotemop.rf.gd/5_piece_puzzle_template_powerpoint_free.pdfIn PDF document text
    • http://figaniver.epizy.com/gorepagovesenedef.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_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 5056 bytes
SHA-256: d21b2dd701f1e34368e30a551655a7f4e4040d4927523de35ebfa9045e462295
font_01_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 12580 bytes
SHA-256: 941b601ac6e3f4adf7c805dbb729ab3a6f86ac3041c8252c17157b0992622337
font_02_sfnt_off00013cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e