Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0d7f76fb7bde8b…

MALICIOUS

PDF

78.3 KB Created: 2021-04-08 04:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a62ce02671a356f4432fcdb448cda2b9 SHA-1: e874aa5d31727fd83dd28f157c0fbc3028954231 SHA-256: 6d0d7f76fb7bde8bd0fec6e641bf9cbbf35f403fabdd0f89d48291770732c5d1
186 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 0.9998

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.
  • 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://xezojetit.ru/wix?keyword=7.1+aplia+assignment+answers PDF link annotation
    • http://paxezot.getenjoyment.net/30635634820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fefe6ed11ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_604a3bd04fee5.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/fixumubigomobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_6042d3696f8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498404/normal_6031793f8ddc0.pdfIn PDF document text
    • http://pizanexezorok.22web.org/meduxurajigatuwivaza.pdfIn PDF document text
    • http://tiboxul.iblogger.org/punctuation_practice_book.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/8e50f.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/kejojuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479223/normal_5fc8ee39d227e.pdfIn PDF document text
    • https://surejijal.weebly.com/uploads/1/3/4/5/134525532/6b4116c36.pdfIn PDF document text
    • https://siwukomeje.weebly.com/uploads/1/3/1/3/131383380/roranadawuverowidoma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_8ead1bb999e74b7ba0c24f6ab7bd9708.pdf?index=trueIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/34138729478.pdfIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_8afac4b19ead4a67bd02740eb6fef1d4.pdf?index=trueIn PDF document text
    • https://b8f7bc2e-5f90-466c-a76c-b8215bfdb3ae.filesusr.com/ugd/9717d9_e2cb611ab05044019295c1f4c4fe4882.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_8b6782dc5b8a4ea9853ae0d3ece631ef.pdf?index=trueIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_e46aab748c7a4f62b87607efa883ca08.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_30940ffe0ad14176a1a063a705e7f3f3.pdf?index=trueIn 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_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 5300 bytes
SHA-256: 185ae58792f3a5e0e7c8169709bc5ef7418da08e450f9ee73996a16b6f53a04f
font_01_sfnt_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 11504 bytes
SHA-256: 96ba4506338bbc9212ea9a9d98a5176ff4592e6af4bb38803229f325fb1aec5c

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