Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a39190f0f71f413…

MALICIOUS

PDF

68.3 KB Created: 2021-02-14 11:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7f5ebbf9c8338a2a2335ce9815d03af8 SHA-1: 99281d598de95dba351e5ff48ca1c6a0a66caf76 SHA-256: 4a39190f0f71f413cca06cdd0ea4ccfe52ef18c2a5e538b2d13ba8015ae826bd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=thor+ragnarok+google+docs+mp4+english PDF link annotation
    • https://nenesezeli.weebly.com/uploads/1/3/0/7/130775424/xegenotejo-walowibag.pdfIn PDF document text
    • https://dabomisefeb.weebly.com/uploads/1/3/0/7/130775205/8101200.pdfIn PDF document text
    • https://fekipasipoxow.weebly.com/uploads/1/3/1/6/131637207/8761812.pdfIn PDF document text
    • https://javagiluxonuv.weebly.com/uploads/1/3/1/4/131406569/292316.pdfIn PDF document text
    • https://mukuriwubi.weebly.com/uploads/1/3/1/4/131483253/rupuxorewavuxar_pukorubikotof_tarodofup_salezobavib.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/e3a7eba3f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_600f75c4a794b.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/dcfc4a.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/kidibixojuk.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/5204208.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/fc751b221bea.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/mijasitu.pdfIn PDF document text
    • https://devivevapidon.weebly.com/uploads/1/3/4/7/134711806/3f422f0e3b28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/midaguvimabof/bluestacks_android_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/partners_in_performance_dubai_office.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/66919078319.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/apple_wireless_airpods_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/car_racing_game_apk_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 5296 bytes
SHA-256: 84354c9e2c2143fa6997af658ddb9212cc3628b61f3973b899f2dbc5c0b6fee8
font_01_sfnt_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 10708 bytes
SHA-256: df4064d41b16ec9a626fceb6dec413fc36f45072c542e30ee995e175b94f240e
font_02_sfnt_off0000f59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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