Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0beeb2de31fe24…

MALICIOUS

PDF

95.8 KB Created: 2021-03-02 21:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3aeec3510d779280d7ee28b357e3b5aa SHA-1: 1569426a1f4b775ecfc3b496f99853b0df0736f1 SHA-256: be0beeb2de31fe24c2f8e6340aeeebb9e952c6c777c963a61dd08453f33a116f
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 0.9994

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://botokaw.ru/123?utm_term=jj+lin+practice+love+lyrics+english PDF link annotation
    • http://narelavupes.22web.org/bejenodumideworutak.pdfIn PDF document text
    • http://bezufosaga.iblogger.org/wanimizanonapuwu.pdfIn PDF document text
    • http://lipejunotuxo.22web.org/grade_5_common_core_math_review_worksheets.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/79205362435.pdfIn PDF document text
    • http://tamowigaxijatot.66ghz.com/tuwixopusegepito.pdfIn PDF document text
    • http://lusaxesa.iblogger.org/18570027143.pdfIn PDF document text
    • http://lusowifivixava.iblogger.org/vumurifiwikowunomi.pdfIn PDF document text
    • http://gixepabu.22web.org/excel_vba_transpose_entire_sheet.pdfIn PDF document text
    • http://nalowisep.22web.org/krispy_kreme_doughnut_nutritional_info.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vanakodezifezuv.epizy.com/rolling_bags_for_court_reporters.pdfIn PDF document text
    • http://ridinodasifaji.rf.gd/corrective_maintenance_plan_or_schedule_answer.pdfIn PDF document text
    • http://pegawatovejugav.epizy.com/58229606478.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/best_minecraft_maps_apk.pdfIn PDF document text
    • http://falogivaxaf.epizy.com/72901508152.pdfIn PDF document text
    • http://dawifugoxumevej.rf.gd/97947974113.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/oxford_common_mistakes_in_english.pdfIn PDF document text
    • http://xevazuguvapuj.rf.gd/70123581227.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/commas_in_a_list_worksheet_twinkl.pdfIn PDF document text
    • http://wesufonezis.epizy.com/nurse_uniform_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/e46_m3_transmission_fluid_change.pdfIn PDF document text
    • http://pagosunizuboroz.epizy.com/netflix_not_working_ios.pdfIn PDF document text
    • http://torumaxot.rf.gd/39864650851.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_off0000e93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 26804 bytes
SHA-256: 962117de9a52585c80adc30fc8b8a958ed1790159dc165b93bdaf008c7a7042d
font_01_sfnt_off00013bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD5 5420 bytes
SHA-256: 5f608a22ad18ab07d66f8ce6abb78bebcade35732407096337c95754c86e582d
font_02_sfnt_off00014e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E50 10360 bytes
SHA-256: 8bd7a41a31c771897845598ba784772fc55cb6d044323d54c6ba8efc23a8af15