Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34284a1c31459ec…

MALICIOUS

PDF

77.2 KB Created: 2021-02-26 06:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 168a214c1ed6a098e27e1d98f41e3b79 SHA-1: 10850465cbb0538b0403e639ccca85e7b4e02549 SHA-256: d34284a1c31459ecb5b32a2eecc8fe3d183af348e70759e0b51cbb9a4040a67d
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, including those on disposable hosting and potentially deceptive domains, strongly suggests a phishing or link-farming attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=what+time+stock+market+close+today+in+usa PDF link annotation
    • http://mnclassis.org/razer_blackwidow_lighting_effects4e8xc.pdfIn PDF document text
    • http://hr-insider.com/movie_and_tv_series_er_apkpvpip.pdfIn PDF document text
    • http://dhl-order.info/power_plus_pressure_washer_manualckk3b.pdfIn PDF document text
    • http://beststudent.space/muveperomadatijeluw82z17.pdfIn PDF document text
    • http://lifeeuro.info/gadejibuz1940j.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/21840707024.pdfIn PDF document text
    • http://hr-insider.com/the_crucible_act_2_countless_conflicts_answersspqj8.pdfIn PDF document text
    • http://swast-group.website/atoms_form_bonds_with_one_anotherpl7rb.pdfIn PDF document text
    • http://mail-autoscout24.net/free_fax_cover_sheet_template_open_office5mz8r.pdfIn PDF document text
    • http://fitnesspack.net/ciabatta_bread_nutrition_informationl7ocm.pdfIn PDF document text
    • http://persequenteamsohbet.com/95640582086nlhhy.pdfIn PDF document text
    • http://winsl.space/confirmation_of_payment_email_templatei6tfo.pdfIn PDF document text
    • http://callup.today/fallout_4_dlc_fileshejcu.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
    • http://bifovigavij.myartsonline.com/mockingjay_part_2_release_date.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_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 5240 bytes
SHA-256: d469edf8ea6e290049a6c524a9bb6c3ab76bb27d93b4b0e13c585bd66657540a
font_01_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 10660 bytes
SHA-256: 2c010b1e58d454ac1dca9b4948be11fd923f091b8401b2b046f75507db72a4ca
font_02_sfnt_off00011940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.