Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d3e16c2a714956…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 13:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bf4531b9ac3d3cc1b92d74e8ee7e7137 SHA-1: cf88d198ad0c6b9f1fbdb52db2bc203a21cf3674 SHA-256: 97d3e16c2a7149565b877cfb541951496d1050a435429bcdddc98d541818d7b4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a heuristic specifically flagging it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=who+owns+homelite+chainsaw PDF link annotation
    • http://resezowuzotul.22web.org/australia_continent_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_60240a6b25629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_60318a29110c6.pdfIn PDF document text
    • http://simkosa.website/would_you_rather_questions_for_married_couples_dirtysbfu0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414353/normal_5fcc3cc47f1e4.pdfIn PDF document text
    • http://bandalet.club/chrome_os_windows_103v9e6.pdfIn PDF document text
    • http://meludisowunefun.22web.org/dawakumixumelamosodu.pdfIn PDF document text
    • http://mabisujolaman.iblogger.org/how_does_the_little_fires_everywhere_book_end.pdfIn PDF document text
    • http://gagefepinulivaf.iblogger.org/samsung_55-inch_q60r_4k_uhd_qled_smart_tv_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496148/normal_5fd32e663e8a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b9f251-527e-4f95-b420-1eb35105b923/wuvimoleru.pdfIn PDF document text
    • http://gumofiwulova.epizy.com/wejajulapu.pdfIn PDF document text
    • http://riperumegebi.epizy.com/appsc_group_2_previous_papers_with_answers_in_telugu.pdfIn PDF document text
    • http://kuleborujakojij.rf.gd/how_long_does_it_take_to_be_sql_certified.pdfIn PDF document text
    • http://vedopurunidir.epizy.com/4242220879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20175ad3-c384-424e-b57e-c24d16166172/summary_of_romeo_and_juliet_act_2_prologue.pdfIn PDF document text
    • http://munonedukadozol.rf.gd/place_to_donate_used_clothes_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4c34e1-9e4f-4b0a-bfb8-0e7f3e077652/tataribetuvurozi.pdfIn PDF document text
    • http://vipuwizu.epizy.com/sowimijonut.pdfIn PDF document text
    • http://mikesivu.rf.gd/69362958342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89817e2-412a-4495-b43e-eba6a5a3502e/king_kong_massage_chair_5560_model_d3000_fuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b592ef-bc9f-4caa-adbe-94698a9a2592/how_to_write_a_presentation_script_examples.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_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 5048 bytes
SHA-256: e4620efe0d13cb60f4652dadd3a37912aa6e31bd42bc23eade176617bf7eba95
font_01_sfnt_off000101ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 11368 bytes
SHA-256: e690c97516112130e0e008d001c5f6a66320a7172bcf1c2eed00d873e6711f73

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