Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b6427000f3661b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-02 16:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2904a5b5a10c80e3f75b03d6e2a3a3d SHA-1: 792d59eb3d7e102556c48d456271fdf82663f5e9 SHA-256: d5b6427000f3661bb4a8c911adccc17a5951cf9ecd233ab1a7728fc54ab3caf5
126 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, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though partially corrupted, mentions 'Jee mains 2016 question paper without solution pdf', a common lure for educational or exam-related phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=jee+mains+2016+question+paper+without+solution+pdf
    • http://wijetaz.mypressonline.com/kingsman_the_golden_circle_full_movie_download_720p.pdf
    • http://zutatowatipo.mywebcommunity.org/41503006067.pdf
    • http://fesadivu.iblogger.org/lowojexiwazunorunagaw.pdf
    • http://wejnpowk.space/271799552663w2aw.pdf
    • http://arbitestpark.xyz/7567401826x7o0s.pdf
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/d80a14c.pdf
    • http://cmbmarketing.agency/kindergarten_coloring_sheets_back_to_schoolpp7c8.pdf
    • http://joy-todays.online/wanojoz6vdeh.pdf
    • http://pearhaidhr.fun/google_search_for_only_filessyzmj.pdf
    • http://manovina.mypressonline.com/what_is_contemporary_philippines_arts.pdf
    • http://jivavesomuviz.getenjoyment.net/gediwilokabaxunoso.pdf
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/benasupapog.pdf
    • http://discovljzg.fun/60599801911qln48.pdf
    • http://enots.space/fitbit_versa_lite_straps_canadaiqvjf.pdf
    • http://afracheat6.xyz/93781847377jjcwq.pdf
    • http://dresdenpharma.ru/51734956510mkqa7.pdf
    • http://myfavoritesun.xyz/redstone_builder_for_minecraft_pe_free_downloadmrbvp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://diwavubodinaroj.myartsonline.com/how_do_you_fix_a_burner_on_a_gas_stove_that_wont_light.pdf
    • http://mulazukaga.rf.gd/steelers_news_report_today.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_off0000fd65.bin
9b83b3afa204ef7b3a8156906652218ac6cd98db32849b08553d703eca6855ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 5968 bytes
font_01_sfnt_off000111a0.bin
fecdbc1128284f7ad6f9f23fb93153a1c45b92903f5c0c69c1c483ca1d60887f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 10980 bytes

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