Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a09c41a22ff0989…

MALICIOUS

PDF

78.6 KB Created: 2021-03-25 02:13:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90123f72e11f8a0ecabbb21092680dbe SHA-1: 71e52d1aa2a6a9c6bc55399a6b4dbfd06e0f0b14 SHA-256: 5a09c41a22ff09899a80d2afb94cf09e6a4537dd50b3150a93849a738e850b76
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/strik?utm_term=stealth+cam+qs12at+ng+game+camera+reviews PDF link annotation
    • http://ripugusulufiluj.getenjoyment.net/esv_large_print_thinline_reference_bible_top_grain_leather.pdfIn PDF document text
    • http://tajizomekoza.iblogger.org/ruderopovenal.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/3JkgiN1/62141943469.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/zjgjb2T/hidden_hearing_ballsbridge_dublin_4.pdfIn PDF document text
    • https://gisidamuxifa.weebly.com/uploads/1/3/0/7/130775495/c2e10ce91cb.pdfIn PDF document text
    • https://dilasakezonaxos.weebly.com/uploads/1/3/0/7/130775260/2444291.pdfIn PDF document text
    • http://tasenatalagotur.22web.org/somamusadam.pdfIn PDF document text
    • https://kedosesu.weebly.com/uploads/1/3/4/8/134853013/durokog_peremi_sawokivutewat.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/51661977216.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/Qqliadb/animated_3d_weather_pro_apk.pdfIn PDF document text
    • http://vetejula.mypressonline.com/pozepuwinatuperesifi.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/1714603.pdfIn PDF document text
    • http://redofokotab.sportsontheweb.net/subtracting_integers_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetalinato.epizy.com/church_administration_definition.pdfIn PDF document text
    • http://roxonolabixatox.epizy.com/piano_sheet_music_creator_online.pdfIn PDF document text
    • http://dimavimamanonev.rf.gd/nezurabetudoxof.pdfIn PDF document text
    • http://notixowazi.rf.gd/importance_of_quality_assurance_in_pharmaceutical_industry.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/tufeporivowozofidotis.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/sistema_endocrino_y_su_funcionamiento.pdfIn PDF document text
    • http://sojizodujibibo.epizy.com/aashiqui_1990_movie_song_bossmobi._com.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/south_african_worship_songs.pdfIn PDF document text
    • http://fakadigat.epizy.com/asus_m5a97_le_r2_0_bios_update.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_off0000f628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 5776 bytes
SHA-256: 8c0c84940bcd5c86bd447c2e23e2193fe6ef57800a5250cceb08e875f5f02989
font_01_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 10444 bytes
SHA-256: 9dc19f211cf2f2ea1d2bff7946c95d68dfebdbb06353631825daa7271b1daf74

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