Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c950e8c5503e7f…

MALICIOUS

PDF

87.1 KB Created: 2021-03-10 22:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cd6e7f16200cc948471ed5d7912fa716 SHA-1: 6a1c5094fa1eae6fcab2c81681ec43b01c6c6dc2 SHA-256: 66c950e8c5503e7f3576f4318c5c58e1aa969faae884672120e24d3cf2903b42
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a site offering 'animal crossing gamecube gecko codes'. This URL, along with numerous other suspicious links found in the document, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=animal+crossing+gamecube+gecko+codes PDF link annotation
    • http://ronifibofizet.medianewsonline.com/wamusi.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/47076428899uka24.pdfIn PDF document text
    • http://reactivascotia2020.com/screen_recorder_video_recorder_app_downloadt095b.pdfIn PDF document text
    • http://kpupnov.pro/netewuvupiwefze7z.pdfIn PDF document text
    • http://reduslim-italy.site/security_analysis_graham_summaryz41uy.pdfIn PDF document text
    • http://grafoanaliz.ru/diono_radian_rxt_rear_facing_bases27c2.pdfIn PDF document text
    • http://fishland.store/11143907515jtb3o.pdfIn PDF document text
    • http://xukiwuze.22web.org/netflix_app_android_emulator.pdfIn PDF document text
    • http://extrameets.fun/kedufobezikeguzeduzudixatneqn7.pdfIn PDF document text
    • http://ig-about.net/uniden_bearcat_bc350a_scanner_antennafnk5q.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/azar_blue_english_grammar.pdfIn PDF document text
    • http://popularchoice.space/vinanobasuxubejoqrefn.pdfIn PDF document text
    • http://blaugrana.ru/cat_eye_mity_8pntwp.pdfIn PDF document text
    • http://fepemewavitik.66ghz.com/la_biblia_en_audio_libro_de_mateo.pdfIn PDF document text
    • http://topdiscount.pro/269895887156xggi.pdfIn PDF document text
    • http://bogplaktnc.fun/adding_and_subtracting_fractions_with_different_denominators_worksheetq6dl0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonapap.rf.gd/crimsonland_game_free.pdfIn PDF document text
    • http://fosadexovoz.epizy.com/pulse_rate_measurement_manual.pdfIn PDF document text
    • http://diresudavu.rf.gd/how_to_draw_the_wither_storm_from_minecraft_story_mode.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_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 5452 bytes
SHA-256: ef682790a1e58f9fbc1c9a0ade9834fbf6423dce6551436a40f9beb277fd941a
font_01_sfnt_off000119f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F2 16564 bytes
SHA-256: 8b6ab562280e10698aa55014f884de339425bc548b48124c343815427b1c023b

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