Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0ab9772e17e19e…

MALICIOUS

PDF

94.5 KB Created: 2021-03-17 03:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d77edfa88aadf0f40d3ee50c7844ef2c SHA-1: afa2a9cbb0eee2a22837e015248325fe15960cd1 SHA-256: bc0ab9772e17e19e1e4af9a3cd72613702650dc6414e549e2efb4269d2f98e06
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 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to Shopify blog templates, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=shopify+blog.+liquid+template
    • https://cdn.sqhk.co/benibavagoge/nUgjwic/vmod_2_magnet.pdf
    • https://cdn.sqhk.co/tatidukigag/BUid5jb/street_basketball_theme_song.pdf
    • https://cdn.sqhk.co/zeboxuze/gvKjbdL/6196092847.pdf
    • http://sotovezi.22web.org/71053509543.pdf
    • https://cdn.sqhk.co/xatuxazaz/ZgiT4ii/gifipabew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gezupipul.rf.gd/parajasimobakikepawoda.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/wifuzirakatorinirofa.pdf
    • http://navadolaje.rf.gd/zinuzapu.pdf
    • https://s3.amazonaws.com/babetafaperaxov/baseball_hat_design_template.pdf
    • https://s3.amazonaws.com/kuxegu/open_broadcaster_software_windows_xp.pdf
    • http://juzatapanosuwi.rf.gd/wedding_ceremony_program_template.pdf
    • http://xezorepolik.epizy.com/peveg.pdf
    • http://zaguvigijosev.epizy.com/daniel_plan_lentil_soup_recipe.pdf
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_d1510c414ef844c99ca1bfd9f1760cdc.pdf?index=true
    • http://pupanifaju.rf.gd/calidad_total_y_productividad_humberto_gutierrez_pulido.pdf
    • http://zafagizidop.rf.gd/90219843273.pdf
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_b5f3a31e4e66401b90a7f239a36de166.pdf?index=true
    • http://wuxipuretox.rf.gd/divobukotuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123fb.bin
4880ab68835db8956bafa106d76fb2f8307eb6fd0bc12e3f3756610a576279a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123FB 5460 bytes
font_01_sfnt_off0001368e.bin
736dd4df7f24ed3e3aad0ee40f23a7f72a82c679ccaa81254775bbd530d96a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1368E 11384 bytes
font_02_sfnt_off00015d4e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D4E 4324 bytes

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