Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0dfc9026009d3b…

MALICIOUS

PDF

71.8 KB Created: 2021-03-28 10:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b407ad22135be2960e7b39bf8e2dcd77 SHA-1: b8f8598754897dd242f34b45013b99fd279afe4a SHA-256: 2c0dfc9026009d3bcd15a3467bb8c74bdb1b7068fd3a35a95db07d7e98efcd28
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://maypoin.ru/123?utm_term=8+cup+chemex+brew+guide PDF link annotation
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/rorebu.pdfIn PDF document text
    • http://vaxetopurorebi.iblogger.org/ms_project_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jhf4quN/tabletop_art_easel_set.pdfIn PDF document text
    • http://ropiwijubasa.22web.org/software_testing_automation_tips.pdfIn PDF document text
    • http://degifutuv.scienceontheweb.net/37443446358.pdfIn PDF document text
    • http://gopururin.iblogger.org/92354172194.pdfIn PDF document text
    • https://mitigovoponezix.weebly.com/uploads/1/3/4/3/134375948/7228401.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/fusion_gratuit_telecharger.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/UmMtUjj/hd_movies_free_2019_play_online_cinema_apk.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/guwopopin.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/BLhdU58/relibufukil.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/Puihic7/87283164998.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/taraxes.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/tetowaronus.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/03b62fba-01e4-45e6-b939-aeb586f12327/73920507066.pdfIn PDF document text
    • http://waraxiv.rf.gd/cvc_words_worksheets_for_adults.pdfIn PDF document text
    • http://borakenibafet.rf.gd/97634275671.pdfIn PDF document text
    • http://gopogawamo.rf.gd/89400408918.pdfIn PDF document text
    • http://nokarox.rf.gd/89241804510.pdfIn PDF document text
    • http://mageparojepu.epizy.com/fekasogetonuroxuxetam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f956ed7-ae1e-44a1-9dc9-7afa06b9cb69/kujolupenosipobotor.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/what_year_is_chemistry_in_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9673e15-cde1-4690-9b36-8014459711e8/the_raven_cycle_gay_characters.pdfIn PDF document text
    • http://gazozan.epizy.com/1164512026.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_off0000db2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 5468 bytes
SHA-256: 6451f4fa62ab5c4cf3990604dfb8de9257066bd269cb5d3bb070673cd69004ba
font_01_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 10688 bytes
SHA-256: 1341b85c289792be70a02baeb832ab2a0c21c186ef1b105dc87e930297540c2c

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