Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b30bc892d055aa…

MALICIOUS

PDF

82.8 KB Created: 2021-02-18 01:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 30744a54243e639aa0ea8645ac30fe9b SHA-1: 165c0ce441e39211645961e291721aa28d2924b7 SHA-256: 88b30bc892d055aad239c592674664c8b1d5f18aa7b8c4f7eb9eb1dc4421a619
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. The embedded URL, disguised as a school calendar, is a common lure for phishing attacks. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it is designed to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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://seumenha.ru/123?utm_term=duval+county+public+school+calendar+2016-17 PDF link annotation
    • https://cdn.sqhk.co/gusiloxi/hhDgfge/lost_castle_temple_pyramid_run_endless_escape.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/XajjhgU/ditaziwumitozukuno.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/bhejcgg/craft_legend_epic_adventure_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457312/normal_6023d77bce2a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_5fe7ac8755c49.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/cNjiejb/top_hits_2019_songs_us.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/AgeoXPE/duck_hunting_boat_blind_designs.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/ha2Iwty/52304878668.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/bUidQJU/vast_survival_multiplayer_open_world.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fcedb3adddec.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/xirixepo/60763427924.pdfIn PDF document text
    • http://larazeratu.epizy.com/cervical_arthritis_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/fuwafulawebidajixatawebi.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/black_friday_full_movie_free_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/wixuzadutologon.pdfIn PDF document text
    • http://zilenidebu.epizy.com/gevosenekelewuku.pdfIn 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_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 6052 bytes
SHA-256: e9ba6a5ecddd42a4b7a582621d628025c21d34366eaed9f94ffefbc03564bb82
font_01_sfnt_off00010d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3F 15512 bytes
SHA-256: 745d4e2807d82519f0f3e5500a268240ca38336a9348d8d495c8b697addcd04c

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