Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15da2f2614f8a2f…

MALICIOUS

PDF

93.4 KB Created: 2021-03-01 06:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c85c77b2759c15ed871fd1f1728daf0f SHA-1: 7fb148dce4248cd7bc90655ed8262879a7ea667b SHA-256: a15da2f2614f8a2f180181929f3c7e687a6197ebba367056a236b3eb49e34025
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with the primary malicious URL being `https://soxebez.ru/strik?utm_term=ohm%2527s+law+solved+problems+pdf`. This URL is associated with a link farm heuristic, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

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://soxebez.ru/strik?utm_term=ohm%2527s+law+solved+problems+pdf PDF link annotation
    • https://cdn.sqhk.co/wokuvaxevaji/fjbjdfC/dodgers_last_world_series.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/cakewalk_no_sound_from_midi_keyboard.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/99935929130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_603bb6245f6bf.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/saying_to_remember_phases_of_the_moon.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/which_is_better_kitchenaid_or_kenwood.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/RjcTyjf/zewavudabozajajim.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/VjjBggV/72474712569.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ahf86To/weekends_only_hours_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490746/normal_5ffc803795f06.pdfIn PDF document text
    • http://golixudib.mypressonline.com/kegividejeda.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/zijAcjd/rupawizudox.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/how_to_calibrate_digital_kitchen_scale_model_ek9180wm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5fc5aede3789a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5fdd308ea5cf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5fecc3b179c9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/application_deadline_for_texas_am_san_antonio.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/hydro_quebec_report_power_outage.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/wwe_finn_balor_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/sleep_sense_consultant_salary.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/40293891675.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/star_ocean_anamnesis_apk_english.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B3 5632 bytes
SHA-256: 71e185d9450d1a50d26d2fdeb9d016e25454066f78a67dafedb194ea705aeb2b
font_01_sfnt_off000127c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C1 12372 bytes
SHA-256: abbe8ca290d649827ace2c567ba22ec933421ec995520705ec1dab0fcf264a48
font_02_sfnt_off00015236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15236 16192 bytes
SHA-256: 2fbb528c30fae61c70ff4082faa5fece981988df10abad1a91cab371b780b9de

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