Malicious PDF — malware analysis report

Static analysis result for SHA-256 8911b4b388772648…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 08:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7221b1fcec1f7ebac456cb8489128475 SHA-1: e9ffe89f3cd7bfe624730e4918ee87b430986e99 SHA-256: 8911b4b38877264856fe53777fe45ffe21df2cb0e36ab3580c7e4dd3d347ea01
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=whirlpool+direct+drive+washer PDF link annotation
    • http://rixanemusijod.mywebcommunity.org/35044713565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_6012964282fc2.pdfIn PDF document text
    • https://xibulifi.weebly.com/uploads/1/3/4/5/134509251/32412793c8e95fe.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/31978130288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_601156bacfb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_6054447f12b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_601a607a1c956.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454547/normal_5fee9636c76fc.pdfIn PDF document text
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/jukiwetepoxavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_6014e5c519562.pdfIn PDF document text
    • http://delinapod.mypressonline.com/xodidepexujawaselupegik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_601886c105d43.pdfIn PDF document text
    • https://xoxatazafej.weebly.com/uploads/1/3/4/8/134861408/406849.pdfIn PDF document text
    • http://xusetifawog.mypressonline.com/tazidor.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/4422094.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/amendments_in_constitution_of_pakistan.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/honda_gcv160_parts_breakdown.pdfIn PDF document text
    • https://lupipoga.weebly.com/uploads/1/3/4/4/134402738/81c6ca0b.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/nimodogezidujenosoge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_603a71e0e5373.pdfIn PDF document text
    • https://webolubodu.weebly.com/uploads/1/3/0/9/130969971/9296208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiforeru.atwebpages.com/91434393805.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/cambridge_latin_course_book_1_answers.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_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 5328 bytes
SHA-256: ac9a1f9105c97e0b2b631edfa291281b6bc1b0ffd043af06203ff8ab379a2b13
font_01_sfnt_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 11004 bytes
SHA-256: 79dd3f328e6bf68259d407b0dbf74ecdbc6d54e290ae1f0a38d35b60029115af

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