Malicious PDF — malware analysis report

Static analysis result for SHA-256 3497514bad7ad16c…

MALICIOUS

PDF

76.5 KB Created: 2021-02-20 08:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23d0e765f3f8e377994bfa3466264a3b SHA-1: 20daf6faad6360f2c018b313db6f6b2009edd44c SHA-256: 3497514bad7ad16ca0602c1c4a019e18c9aab599876f20ccbbb757f6b192a7de
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to contain keywords related to appliance repair, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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://jottigo.ru/strik?utm_term=my+kenmore+front+load+washing+machine+won%2527t+drain
    • http://baugroup.info/what_does_f70_mean_on_a_maytag_dryerys2ma.pdf
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5fc9c773dc51c.pdf
    • https://static.s123-cdn-static.com/uploads/4444626/normal_5fcb5f6c1d43a.pdf
    • http://prechambre.xyz/pijixovifemofi10cmx.pdf
    • https://cdn-cms.f-static.net/uploads/4371014/normal_6015a0b24b9bc.pdf
    • https://static.s123-cdn-static.com/uploads/4412768/normal_5ff8c3bbcad19.pdf
    • http://datidino.iblogger.org/fantasy_football_bye_week_cheat_sheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xepujeroniwazip.epizy.com/minority_report_precog_actress.pdf
    • http://xalezojo.epizy.com/trimet_lift_eligibility_phone_number.pdf
    • http://vasunid.rf.gd/avery_5160_label_template_word_2016.pdf
    • https://s3.amazonaws.com/bufexa/jack_the_giant_slayer_imdb_parents_guide.pdf
    • http://xepepofebaxuvib.epizy.com/list_formalny_angielski_egzamin_b2.pdf
    • https://s3.amazonaws.com/jupudizadid/naduditivewog.pdf
    • https://s3.amazonaws.com/vapelurowar/bash_shell_programming.pdf
    • http://wejelinemadagep.rf.gd/letter_dissatisfaction_service_template.pdf
    • https://s3.amazonaws.com/wutisigila/astrobiology_books_free.pdf
    • https://s3.amazonaws.com/lemerisinivum/garajasinuvesobumekola.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb86.bin
07bbe22233830cc8e6f96c5c710740b9958dbd55d0b700670435b26f6fae1f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5732 bytes
font_01_sfnt_off0000ff12.bin
8dddef13222ff7b6325d99cf30ec24125b786f784c029fd9bd474824c0566cc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 11052 bytes

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