Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8e984f14d9acfe…

MALICIOUS

PDF

77.5 KB Created: 2021-03-21 11:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2789f7b9250531366c7694053efc1141 SHA-1: 9cc2869c14c5c08d7be0d3926ae08ee4fd6e1a2c SHA-256: 7e8e984f14d9acfec795b0b4e00cb99fa0ba6bb69ce45604b13512672b9adb12
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the primary links, https://botokaw.ru/strik?utm_term=what+does+expression+going+down+the+rabbit+hole+mean, is suspicious and likely leads to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+does+expression+going+down+the+rabbit+hole+mean PDF link annotation
    • http://lowabunuzoxa.getenjoyment.net/build_a_booty_workout_plan.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/buongiorno_principessa_piano.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/neato_botvac_connected_parts_diagram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413240/normal_5ff183617f747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_605452bd44054.pdfIn PDF document text
    • http://kigalasabipigo.medianewsonline.com/likabumudejekakurepaxopi.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/tv_broadcasting_technology.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/mubemutolewe/event_planning_website_template_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/100_words_every_freshman_should_know_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/muvipukewerexowa.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/zimugoxusobowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b71a9a-bee5-42db-9bcb-f9320ebbe75c/pidapujajivopevupi.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/mutomimononikumulazifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2effd3d2-e31e-403e-931d-f5e216d5c4d0/ruwumizaralatewirunuzox.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/56935060781.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_e95d05243d2640c59c7bb2f9a883759b.pdf?index=trueIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_2a032673371a49b9b90a3ee14abcc425.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_a19788841a8d4ae7a620800d02416ad9.pdf?index=trueIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_c07ccda40d3f439c9d38f616d4b1ea6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/356cd8a4-25cb-4071-aadc-00375fa9d01a/rizulukedore.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_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 5688 bytes
SHA-256: 0b9a0be554f7dd40d0b4ad00502cb4771f8056209c6c7bdae8753e449a7a6c90
font_01_sfnt_off000100cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 11260 bytes
SHA-256: cb248c9d5a2d468e7cf1831f9c9844493f125f0abff407ce53ec8e98a57b1461

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