Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95e2a2c54f0c26e…

MALICIOUS

PDF

79.8 KB Created: 2021-03-11 22:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5fe0febea9dba19e3f7a839da1b10989 SHA-1: cc201cda0c6764e858f778bd2ec540af708d1dc0 SHA-256: a95e2a2c54f0c26eedbb2c047d84b2a853706bc45cd31ee4252b809921c0d7b1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to 'Arginina akg pdf', aiming to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=arginina+akg+pdf PDF link annotation
    • http://5-euro.info/chapter_18_viruses_and_bacteria_worksheet_answer_key80rzj.pdfIn PDF document text
    • http://usejus.pro/121456535029nzpe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_601086df98c63.pdfIn PDF document text
    • http://migerov.xyz/516893609731frek.pdfIn PDF document text
    • http://car-den.ru/5737427169501mnz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_60190d28e6938.pdfIn PDF document text
    • http://adachivia.store/lmms_tutorial_trap_itamjqik.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/ePZjjCM/draw_so_cute_ice_cream_pusheen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486042/normal_5fdc0289d9bca.pdfIn PDF document text
    • http://shopbest.online/50203548391ahk19.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/jcjbigI/moruwufanid.pdfIn PDF document text
    • http://fb-copyright-help-from.com/my_calculator_app_disappeared_windows_10n7twp.pdfIn PDF document text
    • http://shoop-ft.ru/cake_mania_3_free_full_versionomn44.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/VCs8SAX/sopizeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_602b74725a02d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jazofi/14837527875.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_31db0191cbac4b31ab425e3eb63375a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/biodata_template_for_muslim_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/29514806644.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_4837cec8a0bd423bb8f965f178a4f0ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/spanish_vocabulary_words_app.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_2ddab301c95540d3887e645a14daf80c.pdf?index=trueIn 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_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 5052 bytes
SHA-256: 20d116f9d297aa08554a2f081a36846f84ed4ecf2b5b657dee3b2c6710735630
font_01_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 11116 bytes
SHA-256: 2870a808a46341e58a3a1ffdcef66a4f354b60d236d5e2281635c710928d9dc4

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