Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f240181a532b7a…

MALICIOUS

PDF

76.7 KB Created: 2021-03-19 11:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 381db172be0e46482b9a29397b0e7838 SHA-1: 280d9b63447b7d6ec774fade2963829669a60572 SHA-256: 97f240181a532b7a88c9082fb6a71cb1eb15711722d98d6df25afe6b219f69b7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The embedded URL 'https://nipisod.ru/wix?keyword=franchise+operations+manual+table+of+contents' and the first link in the link farm 'http://wexewowi.rf.gd/pixezedom.pdf' are the highest priority IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/wix?keyword=franchise+operations+manual+table+of+contents PDF link annotation
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/d76445.pdfIn PDF document text
    • http://vebofituzor.iblogger.org/27696630723.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/327757.pdfIn PDF document text
    • http://mosaniz.22web.org/hound_of_the_baskervilles_1983_full_movie_online_free.pdfIn PDF document text
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/d03a5319318e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexewowi.rf.gd/pixezedom.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/armani_boxers_size_guide.pdfIn PDF document text
    • http://vilawemozasiti.epizy.com/what_is_project_scope_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/civilization_like_games_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9aa2ead-b74d-436b-811a-1e5d986efcd7/world_map_countries_outline_vector.pdfIn PDF document text
    • http://pakatikik.epizy.com/lufuvuvikibebanezupug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdc1009-7c11-4731-9ee0-eabab7d24480/mapimedogiwimewevilo.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/timejepegepewutaxufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc47b37-6527-48b1-83af-205e53944058/what_should_you_do_when_you_park_a_vehicle_with_a_manual_transmission_on_a_hill.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/maven_checkstyle_report_configuration.pdfIn PDF document text
    • http://fidawakuxut.epizy.com/11167583220.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/ikea_kitchen_guide_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/amma_amma_full_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/is_metal_gear_dead.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_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 5352 bytes
SHA-256: 0769a84421e0e6d3552146a5e319b22c8b8784f7b407d052a35eca34713ca0ec
font_01_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 10400 bytes
SHA-256: 11311d2525ffdcec11ae558075feb7b3801a6cebe48a7d65c4f777d08a5f2f64

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