Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d02afe658709e2…

MALICIOUS

PDF

73.8 KB Created: 2021-01-23 18:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 013960ec2a077d663dedeec89d91389c SHA-1: 93772a6da1028d7116625a3424a21c37ccbcbe70 SHA-256: 47d02afe658709e2f4f89acca243f692e59ae2e17c4c2d965ac3bf68e077b32e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or SEO poisoning tactic. The primary URL appears to be a search query, further supporting the idea of luring users to potentially malicious content. No scripts were extracted, but the extensive use of external links points towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=evacuation%20map%20sonoma%20county%20today PDF link annotation
    • https://kiwepuzimogavuf.weebly.com/uploads/1/3/0/7/130776877/marokisipadud.pdfIn PDF document text
    • https://tanuroxej.weebly.com/uploads/1/3/4/1/134131309/5880314.pdfIn PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/solixofemiwotubajaso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403804/normal_5ff9812dc154e.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/BwiccON/juniper_2200_switch_configuration_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/ihOgijs/tonekemozorirelun.pdfIn PDF document text
    • https://rodubimalutavos.weebly.com/uploads/1/3/2/6/132695690/gawexolokusoxegijeti.pdfIn PDF document text
    • https://site-1177349.mozfiles.com/files/1177349/archer_hotel_new_york_restaurant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_5fe31b75695ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502236/normal_5fe09888a33c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_60081d9661343.pdfIn PDF document text
    • https://site-1199805.mozfiles.com/files/1199805/small_company_profile_examples.pdfIn PDF document text
    • https://site-1178850.mozfiles.com/files/1178850/70782515878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fd12b1279bbd.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/jixupajitulibomame.pdfIn PDF document text
    • https://pulaberiboz.weebly.com/uploads/1/3/0/7/130775840/xibivumure.pdfIn PDF document text
    • https://site-1174404.mozfiles.com/files/1174404/nuwibelume.pdfIn PDF document text
    • https://site-1168384.mozfiles.com/files/1168384/nivororefumoposamener.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 5212 bytes
SHA-256: 8bc8a2ad74688455e64b493de2bb43829f6446b29896ffce33ae09998d292867
font_01_sfnt_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 10616 bytes
SHA-256: b648d4916dd5260b7bb6bba47b118d2854f6ab989df8ea12ea7c51b4063ba044

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