Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d13e6416ed5f19…

MALICIOUS

PDF

84.1 KB Created: 2021-04-07 22:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b25f0364a5991fb6621bd09ece1fbe7 SHA-1: bcddaa5bf3d880f2c61756e1e2c9111ca2c7ac79 SHA-256: 97d13e6416ed5f196fc77224792c3ba36d2a1fb1b5976cc32f2353f997c8d11f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, which is a common tactic for phishing or malware delivery.

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://lozipotod.ru/wix?keyword=surface+area+of+cylinders+worksheet+kuta
    • http://dalexepegubidi.iblogger.org/wetunarolagepox.pdf
    • http://nitapida.mywebcommunity.org/zubejumisugugigumoputul.pdf
    • http://sufawevugut.mywebcommunity.org/linux_search_for_string.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e6f5b1e1-e53d-48e0-9773-7dbb272ed383/is_it_worth_saving_your_marriage.pdf
    • http://guxefezuguwi.epizy.com/build_acceptance_testing_template.pdf
    • https://uploads.strikinglycdn.com/files/4bec949e-726f-4667-ad61-a37b1ace7694/68639329254.pdf
    • http://zamigunuzowa.epizy.com/alphabet_coloring_book.pdf
    • https://uploads.strikinglycdn.com/files/f0cb159d-429f-48c7-8478-02ae27b0e239/babepojuxiwa.pdf
    • http://pibunowawoxi.epizy.com/nicaragua_cdc_travel_guidelines.pdf
    • http://kanusilos.epizy.com/55952915606.pdf
    • http://rabuxudizuxu.epizy.com/gisusuwimojipogapa.pdf
    • https://uploads.strikinglycdn.com/files/e56429ea-b153-48a4-beb6-51c17d4e4223/stock_market_holidays_tomorrow.pdf
    • https://uploads.strikinglycdn.com/files/ee6e1485-3d49-432e-b1f2-738cfaa35ec9/how_to_deliver_a_speech.pdf
    • http://wudazebej.atwebpages.com/amlie_poulain_partition_piano.pdf
    • http://zadesejofugo.epizy.com/pulanikowomufit.pdf
    • http://divepirat.epizy.com/ceremony_book_free.pdf
    • http://segimoto.myartsonline.com/55051943607.pdf
    • http://xetonuvabogo.rf.gd/cambio_de_a_word_online_gratis.pdf
    • https://uploads.strikinglycdn.com/files/c2cd8682-eada-4103-a450-b0d7f8eebe3e/how_much_do_you_sell_a_screenplay_for.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_off00010a66.bin
4a85a15492180ab2a112db91cdf1fbf4b488e6ccf972660bcbfdbfd65f64440e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A66 5468 bytes
font_01_sfnt_off00011d0a.bin
454654014acde1b9475db5596118326a26038408e64ed2210206dbb084a1396e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0A 11388 bytes