Malicious PDF — malware analysis report

Static analysis result for SHA-256 1898c5bb7c53e486…

MALICIOUS

PDF

77.3 KB Created: 2021-03-21 07:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 79168d6cea9b0476acaafb8fa37eae06 SHA-1: 2ac2fe5ccc18124b89e1ce01e9b1c578b229c52a SHA-256: 1898c5bb7c53e4864b1bee7586d314f14f49e908e1ca2c21896356f73434f016
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan attempt. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, includes keywords related to a Nikon manual, likely a lure to entice users to click on the malicious links.

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://baarspo.ru/wix?keyword=nikon+buckmaster+2+3-9x40+bdc+manual PDF link annotation
    • http://viniveba.mywebcommunity.org/why_is_my_zanussi_tumble_dryer_not_heating_up.pdfIn PDF document text
    • https://visofebofoxofub.weebly.com/uploads/1/3/0/8/130814652/dizenad-rusiduzowi-funorikez-dimopazopajebe.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/how_to_fix_the_heater_in_my_apartment.pdfIn PDF document text
    • https://cdn.sqhk.co/roxirali/hc0T3hj/change_your_voice_app_pc.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/sujet_brevet_pondichry_2020_franais.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/36286168931.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/ruvutuzovolame.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/is_it_boon_or_boom.pdfIn PDF document text
    • https://cdn.sqhk.co/rijolumexeb/Toif2jb/96601049964.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/Cjfheul/occ_fair_lending_risk_assessment_template.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/47883124303.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/why_does_songs_disappear_from_spotify.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/antihistaminicos_2020.pdfIn PDF document text
    • http://peledopa.myartsonline.com/nuzosil.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/kebazalakarute.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/99416378778.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/the_bethesda_system_for_reporting_thyroid_cytopathology.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/when_a_domestic_company_first_begins_to_export_to_india_it_is_an_example_of.pdfIn PDF document text
    • http://nemenarubaz.atwebpages.com/vehicle_parts_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/runudiju.pdfIn PDF document text
    • http://pidusagi.atwebpages.com/clinical_anatomy_of_the_spine_spinal_cord_and_ans.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_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 6040 bytes
SHA-256: c54050a34d0f6ae4bbcf3e4d67c598e22b2360994ab716f0cef66483dfe14fdd
font_01_sfnt_off000100c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C1 11412 bytes
SHA-256: dbe429269169b1492b0db5a0b18819e25b98d0ff13b8cad551f0c511db00dfb6

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