Malicious PDF — malware analysis report

Static analysis result for SHA-256 9576b84164c4d921…

MALICIOUS

PDF

81.1 KB Created: 2021-03-06 13:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ceab25a8ed710bafefaa97b42b469775 SHA-1: 57a22ce1549077d29388f2ac39b8ae590374a855 SHA-256: 9576b84164c4d921632b9b2b52b3c3cab8251211abad77946946a8039c6b8680
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/award?keyword=diablo+2+runes+cube PDF link annotation
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/71aac.pdfIn PDF document text
    • https://felelitujafi.weebly.com/uploads/1/3/5/3/135392562/nagakedoj.pdfIn PDF document text
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/foxixaje-pefarixuf-nuvopogof.pdfIn PDF document text
    • https://fupigipefixoxom.weebly.com/uploads/1/3/1/3/131379213/lasafadoxebipez.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
    • http://fufajapikimideb.epizy.com/medetinutuvuxorevivalip.pdfIn PDF document text
    • http://vufobaratoja.epizy.com/3304194767.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/business_english_advanced_book.pdfIn PDF document text
    • http://lizedugenok.epizy.com/80492995298.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/21799995556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440ac629-99d1-4dee-a371-99ebcac93f23/lipifaxekazanefuxajapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174f4369-cd6f-4764-80cc-dc7920416214/potoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071377b8-fe4c-4604-b1ae-d3eefc750ad1/zezevigekidogekixeza.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/fugeti.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/90256347183.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/java_64_bit_jre_7.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/pilup.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/18132015780.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/52050879931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2792ebcd-f3b5-425d-8655-d181f90bab4c/48673161213.pdfIn PDF document text
    • http://nisinukodepafix.rf.gd/concierto_de_aranjuez_para_piano.pdfIn PDF document text
    • http://lepamiruketujuf.epizy.com/love_potion_number_9_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/takunezimuduja.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 4864 bytes
SHA-256: a2374c8155deb04410d452ab5422c593682e89206ed102b4d671d39d4cf13f00
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 10676 bytes
SHA-256: cb21d60c17a163b08640e2b65279413ed97aab7e766aa2c0e66c23a55578b696
font_02_sfnt_off00012969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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