Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1dc8034a532f5e…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 21:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 220bb606422881e843ce690feb61e1f7 SHA-1: fd0ce79f23b27d4a02f579421cd749060d3a5b55 SHA-256: 1b1dc8034a532f5ef498e5aa36f6f044a147402aac62e82c67525a78a1dd3af9
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'check engine light code', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=how+to+check+check+engine+light+code PDF link annotation
    • http://rinavorepem.iblogger.org/ravizukefuvar.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/79795343436.pdfIn PDF document text
    • http://itawomen.fun/martyrs_full_movie_2016_freelibig.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/dungeons_and_dragons_5th_edition_unearthed_arcana.pdfIn PDF document text
    • http://kukushpa.fun/77394166264guhfw.pdfIn PDF document text
    • http://prestige-air.space/66301572044jetdv.pdfIn PDF document text
    • http://msertis.xyz/if_im_black_what_is_my_ethnicity4zfss.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/ravixekomejavixonep.pdfIn PDF document text
    • http://heliusdesign.ru/republic_of_doyle_cast_season_3_episode_55do2n.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/troy_bilt_4_cycle_string_trimmer_leaking_oil.pdfIn PDF document text
    • http://podcard2020.site/81287331640xkrkl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teworubinogo.epizy.com/nikulofarufojobodol.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/don_t_starve_modding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/hubspot_email_marketing_certification_exam_answers_2018.pdfIn PDF document text
    • http://mixomexazuvoxod.rf.gd/tapetogogesuvugufopulofin.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/bagshaws_livestock_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/singer_heavy_duty_sewing_machine_4432_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/beginner_english_test_with_answers.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_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 4832 bytes
SHA-256: 325e00beeb0cc8cee0050315c8cf5ff1dbc8d272d1db3e8e11a9220c7a196035
font_01_sfnt_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 10240 bytes
SHA-256: 423828ade3cc89880208ffc960e45324289abdb274f63dc762f36e5eb35de444

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