Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fd9db50d24a63a…

MALICIOUS

PDF

66.0 KB Created: 2021-03-03 00:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 622c688454af4f7413af7553d1e710be SHA-1: c8121d69d556f1b6ab1fec6341a77b1d5e2672a4 SHA-256: f2fd9db50d24a63ac28b3ba49933619ea9325d7e59babaac92d4b679e03b92ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, further supporting a malicious purpose.

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://druttle.ru/strik?utm_term=brother+pt-1280+p-touch PDF link annotation
    • http://bukevow.22web.org/lenovo_y510p_bios_update_windows_10.pdfIn PDF document text
    • http://xevokegejir.iblogger.org/how_long_is_paternity_leave_in_california.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/fleischner_guidelines_nodule_follow_upzfp6u.pdfIn PDF document text
    • http://zikifogomi.22web.org/59436361073.pdfIn PDF document text
    • http://jiludedo.iblogger.org/netflix_movies_windows_7.pdfIn PDF document text
    • http://luxazeguliwa.iblogger.org/73039187554.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutemimiseg.epizy.com/why_does_my_dyson_cordless_keep_stopping_and_starting.pdfIn PDF document text
    • http://vuruwabudakase.epizy.com/keynote_app_presentation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/dj_golu_babu_2019_song.pdfIn PDF document text
    • http://vovajixavago.epizy.com/39727271367.pdfIn PDF document text
    • http://fipulosabonug.epizy.com/dead_poets_society_viewing_guide.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/25550612358.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/what_can_i_eat_at_jersey_mikes_on_keto.pdfIn PDF document text
    • http://desakoda.rf.gd/anahtar_teslim_tutana.pdfIn PDF document text
    • http://puzulipanaro.epizy.com/towodatoso.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/98500794713.pdfIn PDF document text
    • http://gilotekovipani.rf.gd/dd_warlock_spells_explained.pdfIn PDF document text
    • http://latilofu.rf.gd/numerical_estimation_questions_and_answers.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_off0000c322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC322 5200 bytes
SHA-256: e6025ea19a5b39f06ad877eb8096907aa6b99537deddb60ac094d85df537b1e1
font_01_sfnt_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 11384 bytes
SHA-256: da3215588d77b23469928c3c7a3c9860bf5fbc98de3b22ab7f28f7b2390f90b2

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