Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a96ca238fc658f…

MALICIOUS

PDF

65.2 KB Created: 2021-02-23 04:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 947ef10dbd7bf633c362fbde4164a310 SHA-1: 8d7f93c727cadb4aa5b6550dfbaf5cfb7046de13 SHA-256: 97a96ca238fc658f8d79764a0c6aff5fb4ff385c752139454d3cf1e006421b69
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier strongly indicates maliciousness, supported by heuristics identifying the PDF as a link farm hosted on disposable domains. The document body, though heavily obfuscated, contains references to URLs that are likely used to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://druttle.ru/aws?utm_term=ford+501+sickle+mower+pitman+arm PDF link annotation
    • https://cdn.sqhk.co/texekikevow/fjghbEr/como_jogar_dama_online_com_um_amigo.pdfIn PDF document text
    • http://hermidkovo.info/kenmore_ultra_wash_quiet_guard_4_manualw21cp.pdfIn PDF document text
    • http://bestsaleshopin.xyz/n64_emulator_android_multiplayer_wifia0j8m.pdfIn PDF document text
    • http://copyrighthelpptteam.com/jogonikazidipisumt1xz6.pdfIn PDF document text
    • http://dutov.org/guidelines_colorectal_liver_metastases9s3mn.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/chhFgjJ/5533291046.pdfIn PDF document text
    • http://abanca-electronica.com/human_body_weird_factsctycd.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/g2iiBid/android_secret_codes_for_sportybet_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365562/normal_5fe222b72b1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fe930738021a.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/8KiNKjd/swahili-_english_translator_apk.pdfIn PDF document text
    • http://lalashoppen.online/van_der_waals_a_and_b_values_for_co24vl8q.pdfIn PDF document text
    • https://cdn.sqhk.co/gimowiboxero/juigThh/56789323974.pdfIn PDF document text
    • http://gutprod.xyz/plank_ski_jump_exerciseia473.pdfIn PDF document text
    • http://cherrypimp.online/chhath_puja_song_dj_2017ljas2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaxuvep.epizy.com/gakazinosidowibokizovi.pdfIn PDF document text
    • http://gakenefux.rf.gd/27457044867.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_off0000c005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC005 5648 bytes
SHA-256: a35ba9101ab746a00c39fa863293cf73403005fdc1f8609fbf0f87d43fef71ff
font_01_sfnt_off0000d348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD348 10308 bytes
SHA-256: 9e7e5a145051f87eda389612f61cd81042d582f8054d8cc4a40db611093bef44

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