Malicious PDF — malware analysis report

Static analysis result for SHA-256 218fd50f0dd907d4…

MALICIOUS

PDF

96.6 KB Created: 2021-03-18 18:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d20576db226abde8cbdf94994ce3e3b9 SHA-1: 14496f54eb07ccd82fc87f9250feb5cc7abf2137 SHA-256: 218fd50f0dd907d443628ed90a88d9ffa669edf2c7b6b1017fa6c4cd10e58d02
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/strik?utm_term=basics+of+biblical+hebrew+video+lectures+chapter+2 PDF link annotation
    • http://rikafitamedad.medianewsonline.com/vagevifurenobupujakurelu.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/eia3qSj/repufedewoborivaxubar.pdfIn PDF document text
    • http://ravevuzovije.mywebcommunity.org/63955312995.pdfIn PDF document text
    • http://mugurapit.sportsontheweb.net/52294142107.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/aZ4iczG/19110689088.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/gender_barriers_to_communication.pdfIn PDF document text
    • https://cdn.sqhk.co/kepozote/difXCjd/motorsport_manager_mobile_3_mod_apk.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/american_english_file_second_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/biihhg8/cars_for_sale_craigslist_chicago.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/defodebave.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/how_much_does_a_cleaner_earn_in_south_africa.pdfIn PDF document text
    • http://mebotus.mypressonline.com/tolaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/ib2jgtE/85233448226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/089364a1-7156-4bf1-9f59-50e966b8a07e/basafusamefabijete.pdfIn PDF document text
    • http://sogulonogob.epizy.com/new_bollywood_songs_free_2017.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/synthesized_and_inherited_attributes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3943a5bf-e7aa-4fed-bbf6-6b62effc6319/green_eggs_and_ham_book_lyrics.pdfIn PDF document text
    • http://vojilub.rf.gd/homonyms_worksheet_for_grade_4.pdfIn PDF document text
    • http://ravumewikuw.rf.gd/what_is_becky_worley_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b62060-2fbf-4b2d-aeaa-536350a70fd2/how_to_charge_the_noco_genius_boost_gb70.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d69f3e-9aea-4bf2-9536-a36c09732f10/34579512997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547c6029-94a8-4d8f-bf98-341e2bc789ec/alan_watts_falling_in_love_song.pdfIn PDF document text
    • http://kagimotazife.epizy.com/pawisemavemebem.pdfIn PDF document text
    • http://mevusajilitum.rf.gd/80624460158.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_off00013947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13947 5716 bytes
SHA-256: e9d4d13f42de1f9b688420185773ff08d83f09021a5462134666063df257f952
font_01_sfnt_off00014cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC9 11900 bytes
SHA-256: 7e8f2747f25e5e25ac21396abab6b2ad13832effda670434eb7355b535e6d6dc