Malicious PDF — malware analysis report

Static analysis result for SHA-256 97373db1205bb652…

MALICIOUS

PDF

102.5 KB Created: 2021-03-08 14:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4201600f7bde84a6e6ede97e434b5e94 SHA-1: bf099f6f94f2c6834bb807fa5bb04c7f9250fa7f SHA-256: 97373db1205bb652bf6875cacc68288b7cff49f544e173bb5d00a283b14edb92
156 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, specifically as a phishing trojan. The PDF contains a large number of external links, with one heuristic indicating a 'mass external PDF link farm'. The primary malicious URL identified is 'https://dugedepap.ru/123?utm_term=a+to+z+odia+song++2017', which is likely used to redirect users to further malicious content or phishing pages. No scripts were extracted, but the PDF structure and link farm suggest a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/123?utm_term=a+to+z+odia+song++2017 PDF link annotation
    • https://cdn.sqhk.co/perikowep/h0NWgey/23688578703.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/3NjcRhg/79603172903.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/lazelivatutixufo.pdfIn PDF document text
    • https://jaduxokapatusiw.weebly.com/uploads/1/3/5/3/135301375/4795825.pdfIn PDF document text
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/nawuxumozive.pdfIn PDF document text
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/goxiwerabogem.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/jHMqgdv/juwubuwanaravebuxovomabi.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/gigukoxufuj-resawutosova-rijoralupufogo.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/nerudusuzefux.pdfIn PDF document text
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/7deebf460a79b.pdfIn PDF document text
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/vijomi.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/lerezazo/profile_page_template_bootstrap_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/latadimes.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_29176a1918a740ef8afba3ebad2309d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regovadeje/bookworm_for_android_tablet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/23671750929.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bamojevomavuxorivigokos.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_beb020e235f84b73ac8d6960a0f2e649.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/graphing_piecewise_functions_worksheet_with_answers.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_a6400d12f01b49d78e50510486e265e4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/jisarum.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/management_skills_test.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/assamese_bihu_dance_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/gewezeve.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_off000152e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152E2 5308 bytes
SHA-256: b7b15845ebb266dfc36169a37ee9b33df189cf109c58c8683f800f89eaa3b837
font_01_sfnt_off00016518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16518 11948 bytes
SHA-256: b6918ce30ad9a6d833e7975137003192b6a43a0a66791507cee2758fedf01c8e

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