Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2696a5be1b0747…

MALICIOUS

PDF

79.3 KB Created: 2021-03-20 23:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbac03c59a4a521ec12ce36c7e81e832 SHA-1: 62ef0ca0f54c52674932659ca5151cbc4c67d831 SHA-256: cd2696a5be1b07479479e173763d66b70bf8b47dadba3fa0c3b05f7c21a0ba30
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 URL that leads to a domain associated with malicious activity. The document body, though heavily obfuscated, suggests a lure related to educational content, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://midufefew.ru/wix?keyword=parabola+practice+worksheet+with+answers
    • https://cdn-cms.f-static.net/uploads/4371003/normal_605283a5ae175.pdf
    • http://moxufelomewiziw.iblogger.org/webotojerugibanotesezodi.pdf
    • https://static.s123-cdn-static.com/uploads/4455902/normal_5ff6a78f38ef8.pdf
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5fcdbe3d4d721.pdf
    • https://static.s123-cdn-static.com/uploads/4371536/normal_5fed9218489e0.pdf
    • http://lenugaguv.medianewsonline.com/senatafobudizoxugen.pdf
    • http://mogimetekojubar.scienceontheweb.net/is_the_book_prisoner_b-3087_fiction.pdf
    • http://kiwenalod.medianewsonline.com/how_to_set_g_shock_ga_110.pdf
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5fe2288dd5db6.pdf
    • https://cdn.sqhk.co/javeduner/mgiwfge/49865144689.pdf
    • https://cdn.sqhk.co/pixafosabow/fhcgfig/free_net_apk_download_for_android.pdf
    • https://cdn.sqhk.co/merojuniv/ifjeheO/pandemic_board_game_rules_cured.pdf
    • http://bidizujimon.getenjoyment.net/how_to_make_a_flapping_paper_crane.pdf
    • https://cdn-cms.f-static.net/uploads/4411489/normal_60478dbf7cb33.pdf
    • https://cdn.sqhk.co/kuzosexiwugu/OESBhe6/pomesutolufitok.pdf
    • https://static.s123-cdn-static.com/uploads/4385206/normal_5ff9d4298d2ea.pdf
    • http://sugameloxufe.mywebcommunity.org/110cc_pit_bike_semi_automatic_for_sale_uk.pdf
    • https://cdn-cms.f-static.net/uploads/4415292/normal_603ad4209e6a3.pdf
    • https://static.s123-cdn-static.com/uploads/4427091/normal_5fcea33558721.pdf
    • https://cdn-cms.f-static.net/uploads/4450502/normal_6054d403f324e.pdf
    • http://jokojujut.medianewsonline.com/genimixufev.pdf
    • http://samewejasaka.iblogger.org/5242796020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lipabarud.atwebpages.com/32194907207.pdf
    • http://tumobuwixakeg.atwebpages.com/amistad_case.pdf
    • http://fubolorira.epizy.com/vojituxinidoretowodot.pdf
    • http://dekuroveki.rf.gd/polyatomic_ions_packet_answer_key.pdf
    • http://bawatusarab.epizy.com/android_native_smart_app_banner.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_off0000f670.bin
8378ad31e7a5229ce146c54577b34e96c57b620b75f8afabd0510a82fcae3e05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF670 5320 bytes
font_01_sfnt_off00010888.bin
26202ef653f5c6101fd0667d46e3436a3fc558ddb5436d413de24ea4edba70c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 10892 bytes

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