Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02bb447b62efb38…

MALICIOUS

PDF

93.8 KB Created: 2021-03-29 11:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: be03e641c334f6203699998d28cad28a SHA-1: 55ce4a95c9d0ff5d7cdb6aed7257fd16323cab54 SHA-256: c02bb447b62efb3865f0bf2b9386bb0e57f6b930856b9a20b7783dfb3f0d38cf
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious sites. The presence of embedded URLs suggests an intent to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=wheel+of+fortune+answers+same+letter+3+words PDF link annotation
    • http://rezotu.xyz/colonialism_and_imperialism_in_heart_of_darknessauehv.pdfIn PDF document text
    • http://graatorama.fun/percy_jackson_characters_watch_the_movie_fanfiction6i248.pdfIn PDF document text
    • http://soinjaga.ru/37923599541k9rax.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/PEhjhb8/tribal_rites_boulder.pdfIn PDF document text
    • http://nubolats.xyz/23551238764d2q87.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/geahbCo/open_houses_dedham_ma.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/kjjQfcF/web_diagram_maker_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/Yhejbgc/1968_mattel_s_dancerina_ballerina_dancing_doll.pdfIn PDF document text
    • http://help-service-support.com/wwe_fastlane_2019_results_bleacher_reportmqjj4.pdfIn PDF document text
    • http://uscreditscore.info/utorrent_web_for_windows_10nm9ht.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/caebf0cb-f308-465b-a5a6-4059c10838ec/88032393132.pdfIn PDF document text
    • http://todigelexi.epizy.com/psychology_in_marathi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/gps_garmin_gpsmap_60csx_software.pdfIn PDF document text
    • http://sajobovu.epizy.com/how_to_use_my_uniden_scanner.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/jackass_3_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc80c18-af37-4bbf-8848-7fc51991c087/how_to_weld_book.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_off00012e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E83 5416 bytes
SHA-256: 28f1875f7ad197408d85f65cf79afeeb6fd640d75dffcc956a263310aa4370cf
font_01_sfnt_off000140d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D4 12380 bytes
SHA-256: d7004a7d1d41c31c375ac4515a67e89f70ac3dcf58ebb769ad23c23cf320235b

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