Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dcf122e9234516…

MALICIOUS

PDF

106.4 KB Created: 2021-03-01 09:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1746ab12211f2a16c704d912ef2a353b SHA-1: 70e365602ccc9c2329d208e9a80b4092495c8f07 SHA-256: 32dcf122e9234516c6673c8b72d15912cf1b009aa91fbfb5c447f9dc4230a674
184 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'The nightingale and the rose' summary, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=the+nightingale+and+the+rose+summary+ppt In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466366/normal_5ffdf0393aa7f.pdfIn PDF document text
    • http://llloooodddd.space/45049858129fx7la.pdfIn PDF document text
    • http://mini-cam1.club/how_to_draw_cool_stuff_book_amazonhbgoq.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/LW8ZhbA/sports_board_games_2019.pdfIn PDF document text
    • http://aires.fun/naxuregukixemuvxkdvv.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/ij3r9id/76849231806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_601d941b72582.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/Inggjcg/small_group_lesson_plan_template_editable_free.pdfIn PDF document text
    • http://mainsale.pro/22661032770qthg6.pdfIn PDF document text
    • http://telgrm.site/kutisubis7qjx.pdfIn PDF document text
    • http://sodowetan.mywebcommunity.org/altec_lansing_-_mini_lifejacket_jolt_imw479l_portable_bluetooth_speaker_-_black.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/PnjdAij/the_wolfman_1941_full_movie_stream.pdfIn PDF document text
    • http://biweekamnf.com/how_long_are_eyelash_extension_courses917u1.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/73132451021.pdfIn PDF document text
    • http://fewewapi.iblogger.org/fesogifejezaxezikuj.pdfIn PDF document text
    • http://hydrofthol.space/91245397954htc9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_6009be9c0ed9f.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/V8djf9v/5831738288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donirodep.epizy.com/penisezasunusovavezisev.pdfIn PDF document text
    • http://bukuzagalu.rf.gd/data_science_interview_questions_google.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_off00015e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E84 5424 bytes
SHA-256: 55ec5453d893a0f724593d6673b2c0e0ec448891b56f8344d68dce77728d4bd0
font_01_sfnt_off000170d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170D5 12400 bytes
SHA-256: 2a4b809da38d74218c9dd94b79b1c26521a5274ebfbc0cf86a48028b629779b5

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