Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53df1dca926904d…

MALICIOUS

PDF

81.9 KB Created: 2021-03-09 07:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 47550a79bd8a276c5bd89f7d0705dfbb SHA-1: 1f285e6ee3faf8618de21cefdf1cd2faea9ffd80 SHA-256: f53df1dca926904d500d34faef191248de0030317b2f154673bd03311082d28b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be a lure for live streaming content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links on disposable hosting, suggesting a phishing or spamming operation. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to a malicious site for credential harvesting or malware delivery.

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
  • 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/123?utm_term=guideus+tv+live+streaming PDF link annotation
    • http://kivudutamazawan.22web.org/vitamin_d_deficiency_treatment_guidelines_2019.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/tork_1109a_timer_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/iceXjaN/radamoj.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/YEjaIOB/tosapozolegutupikej.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/OhgKMhh/instagram_photo_downloader_app.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/awbfzOo/kavixututaxegibevaxepaban.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/c40900e2-61aa-4af1-85c3-f826a5508c63/what_charger_does_an_lg_phone_use.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/21648625150.pdfIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_fadcebdc24c2446eaffa1b7f6cd46502.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/79695869-caaf-4c82-95c5-be8c54da3717/html_css_javascript_jobs_in_pune.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/mukajonotutulime.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/k7_antivirus_free_2017_full_version.pdfIn PDF document text
    • http://tavarifa.epizy.com/google_sheets_query_order_by_count.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/98386589076.pdfIn PDF document text
    • http://tivapatovike.epizy.com/runojevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d3a1d9-bfb4-4c5d-81a5-5ff8e016c3be/18105653535.pdfIn PDF document text
    • http://repeputowuz.epizy.com/dragon_age_inquisition_multiplayer_avvar_guide.pdfIn PDF document text
    • http://kololujes.rf.gd/maloxitimeg.pdfIn PDF document text
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_01ddac1d7f544cd493631e52cfdfbc07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/webodotisozokedotaxafe.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_9f5d5b423f71427ab72624c2ca00861e.pdf?index=trueIn 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_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 5236 bytes
SHA-256: ae755b02506e859edb5200547deeb2e4a24690c04f35732e5bf8c025be9adcb1
font_01_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 11304 bytes
SHA-256: b447da241005f1f5a06562ff5331413c4f718c65034cd52195f5b639979e8964

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