Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4d993829de7427…

MALICIOUS

PDF

82.7 KB Created: 2021-03-20 18:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e6eb4d53081ea30dc50992727b10c7c9 SHA-1: 216c4414da22af43420e507d5f7898e70f04ad9b SHA-256: 0e4d993829de7427f6ca8a8f990bb21a9a76ccf65d8a8a6ba57b322933117b70
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 0.9992

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/wix?keyword=serenity+spa+%2526+massage+mt+pocono+pa PDF link annotation
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/9ba56e1a4e4b8.pdfIn PDF document text
    • http://requiredjokblog.com/juego_busqueda_del_tesoro4sn84.pdfIn PDF document text
    • http://opit.space/bose_wave_music_system_iv_with_cd_player_and_alarm_clockzu7cy.pdfIn PDF document text
    • https://zizudenavoxe.weebly.com/uploads/1/3/4/0/134017195/najutavozemida.pdfIn PDF document text
    • http://jsexj.fun/first_alert_model_9120b_3_beepsyv4st.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/nirawuw.pdfIn PDF document text
    • http://katermore.ru/warhammer_40k_rpg_deathwatch_core_rulebookcnwd5.pdfIn PDF document text
    • http://optarfes.com/kekudakutogatevgydh2.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/23697403393.pdfIn PDF document text
    • http://googsnat.space/st_thomas_hospital_nashville_tn_patient_informationpe34m.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/difewevorekokojujul.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/luboritojimofazesozovufi.pdfIn PDF document text
    • http://salonop.xyz/computer_programming_for_dummiesk6e7n.pdfIn PDF document text
    • http://1fps.ru/kexefo8b6x3.pdfIn PDF document text
    • https://gunisuzafi.weebly.com/uploads/1/3/4/3/134311694/dimekoki-rijiwade-xeromuworuxose-keturijoranoda.pdfIn PDF document text
    • http://noverst.xyz/zugubasusufuruwifelisupork8xz4.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/7_day_ketogenic_diet_meal_plan.pdfIn PDF document text
    • http://begdas.space/672160945855nzjs.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/satedafadusizo/brother_in_korean_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/61922285406.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/xojetolu.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/70254725283.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/aviator_f_series_smart_watch_user_manual.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_off0000fb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 4664 bytes
SHA-256: f3e7c5ba011d18665d44ff7f86fae45cd91d0f24a079f91012d33faca6825808
font_01_sfnt_off00010b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2F 10684 bytes
SHA-256: 4a7de55a3bbebda6b427af0e125a454bee09f3cf4f4ed9df0a2acc66ea628016
font_02_sfnt_off00012fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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