Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb57ec2f5a0e57f6…

MALICIOUS

PDF

76.6 KB Created: 2021-03-17 06:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d7ceed127adec3409068af9947b958c SHA-1: 451af014d69fb5cabfad7068533eccf918ef9419 SHA-256: eb57ec2f5a0e57f6cb98f378edb62c496be6b616cf8d914e3cb1f6bcff03cb74
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to personality tests, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=type+a+type+b+personality+test+pdf
    • http://pavubase.iblogger.org/71991653795.pdf
    • http://vbruti.site/jowovagola9sy.pdf
    • https://tunoworuv.weebly.com/uploads/1/3/4/0/134017870/9415113.pdf
    • https://jafuxudaxifi.weebly.com/uploads/1/3/0/7/130739212/24e5b1691da3f.pdf
    • https://cdn.sqhk.co/pifixijowoka/hijcgiy/75933317540.pdf
    • http://erse.xyz/garmin_forerunner_220_manual_portugues5c9x5.pdf
    • https://totorososine.weebly.com/uploads/1/3/4/8/134892144/diwetezonobu_regovilawom.pdf
    • https://cdn.sqhk.co/zafupusapun/TjbbF0Q/pastel_friends_dress_up_game.pdf
    • http://sibiwuketilivi.22web.org/python_tutorial_with_examples.pdf
    • http://barberking.best/dujurmqnc3.pdf
    • https://cdn.sqhk.co/xagogudexo/u2T0gjs/gunshot_sound_effect_in_words.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_e64c082b64b5453bb72d8b3d1cd4ab6d.pdf?index=true
    • http://kakarares.epizy.com/79308014958.pdf
    • http://zamoguwudegovo.rf.gd/bootstrap_3_footer_template_free.pdf
    • http://karifopiti.epizy.com/how_do_i_know_what_laptop_charger_i_need.pdf
    • http://jidodurej.epizy.com/cout_transformer_garage_en_suite_parentale.pdf
    • https://f8b2de7a-6012-4721-b8f1-df5267d6bb95.filesusr.com/ugd/8ebb60_a1fdf7d9b4b647059bf085962e7d4e4e.pdf?index=true
    • http://bitesokilok.epizy.com/76538663786.pdf
    • http://tijeluko.rf.gd/xukuwivemuwigasusu.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_off0000ee7a.bin
0d6d98cf5180b1d578d41ae403af715dace8c7321d12ffef136916a52e24f0b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 5224 bytes
font_01_sfnt_off0001004c.bin
d9b1169d63bd44ba2d274fa0345a93c31a74e7b21730451d430faf2897983ef9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 10964 bytes