Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22b4cac7d832579…

MALICIOUS

PDF

77.3 KB Created: 2021-05-01 12:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3f0ba2760420e5526f21af918b5ff045 SHA-1: dc89c687b327a83a7d1cec8e26544d656538b75f SHA-256: a22b4cac7d832579615637282e4da30a66948bade758fb076e0f0422eb3e13df
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the presence of many external links points towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=what+is+a+fire+and+ice+laser+facial PDF link annotation
    • http://woziwowariv.sportsontheweb.net/best_online_certificate_programs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/gfIjeii/novugupo.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/what_to_write_in_a_21st_birthday_card_for_a_niece.pdfIn PDF document text
    • http://togoxuruk.22web.org/92249004487.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/18h3tih/space_jam_album.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/fItNtxJ/ralitojafonanorafeweso.pdfIn PDF document text
    • http://sifinujox.sportsontheweb.net/how_to_change_audio_settings_in_zoom_during_meeting.pdfIn PDF document text
    • http://medemukiduba.sportsontheweb.net/81905703437.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/ifjcif4/jasoboleninekijokos.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/23859473507.pdfIn PDF document text
    • http://pifozuvarivin.22web.org/define_nomenclature.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/kusogipom.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/aquaculture_in_the_philippines_2020.pdfIn PDF document text
    • http://ketizivo.22web.org/bijopokipopozusaxoguzelar.pdfIn PDF document text
    • http://jesuter.22web.org/4095028260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rasiverud.epizy.com/5th_grade_common_core_math_standards.pdfIn PDF document text
    • http://sutepaxevak.epizy.com/sadonawofazalotogufa.pdfIn PDF document text
    • http://gulesovel.epizy.com/cours_d_anthropologie_sociale_et_culturelle.pdfIn PDF document text
    • http://faxaxesaxejov.rf.gd/synthesis_of_aldehyde_and_ketone.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/kemapaf.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/craftsman_lt1000_specifications.pdfIn PDF document text
    • http://xenexafa.myartsonline.com/blackdecker_crisp_n_bake_air_fry_toaster_oven_to3215ss_reviews.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_off0000f07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07E 5124 bytes
SHA-256: 474e30c00a3c50817e6a89da6f4d9bbb662a6b68900e465c8d19c3b63785fc54
font_01_sfnt_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 11188 bytes
SHA-256: 1150fd8ce3685037afe949487e72b4d6ad8f7274e5cca38552f5bd15968de819

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