Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac6920b0d06d0b8…

MALICIOUS

PDF

72.6 KB Created: 2021-02-22 12:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 471360b6cd990f3a8c59e96a8e27366e SHA-1: 3cf9d2b6ce56a14ebd36e9de5d64e9949bd1579b SHA-256: 3ac6920b0d06d0b8363ba1040e8be87837ad4cb331da714e32f568c865b92fde
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://druttle.ru/wix?keyword=where+was+the+movie+big+chill+filmed PDF link annotation
    • http://lesantyqas.online/exploration_park_mill_creekjadsc.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/cicNqjc/tirimokorewezo.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/Zhfxz7M/50456210938.pdfIn PDF document text
    • http://studytogether.fun/linking_google_drive_to_wixi1aj1.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/hAxDif2/sepegawotarofugobulov.pdfIn PDF document text
    • http://artistichomesolutions.com/896810661666vd21.pdfIn PDF document text
    • http://itrom.fun/red_cross_first_aid_training_online_free97q49.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/desinfeccion_de_frutas_y_verdurasor0cu.pdfIn PDF document text
    • http://canlisohbetim.net/18658634283xx041.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/65mhfhi/lenovo_smart_assistant_app.pdfIn PDF document text
    • https://zesijijonade.weebly.com/uploads/1/3/0/7/130776416/88c45aabbeec9ce.pdfIn PDF document text
    • http://circus.market/sutujolixubarobafutumx9ybn.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/e4560f98864eb.pdfIn PDF document text
    • https://davanowaxisipu.weebly.com/uploads/1/3/5/3/135318110/0364c75bc64df29.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/lizuseguwix/77917789355.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/92587743505.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/wuzokoxifegagifekofusa.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/java_6_windows_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/2470273989.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_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 5424 bytes
SHA-256: 9bb2c2af446503319857c23495793af60580a4956c6861e46614dfa5e2e5a42b
font_01_sfnt_off0000e4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 10104 bytes
SHA-256: 595c1cf1851e54fd7fb3c36330ebd57231f75e0dbc4f2bfa9847411aef59a073
font_02_sfnt_off00010734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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