Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9e1eb150a0fd73…

MALICIOUS

PDF

38.2 KB Created: 2020-04-03 01:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 50b4f2baabb03b2e97785afa7b83e884 SHA-1: c7815c4574f85fa30444d16cb05055c6a23c15f2 SHA-256: 4a9e1eb150a0fd73052f1f8fe38f7823abb2870c51eaa4b03e9a2a71d2149b04
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily corrupted, contains text related to 'Turkish karaoke song download free' and references the wkhtmltopdf tool, suggesting a lure for users searching for such content. The primary attack pattern involves redirecting users to a link farm of SEO-optimized PDF files hosted across numerous domains, likely to generate traffic or serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://traceetreasures.com/uploads/1/3/0/5/130551994/130551994.html#t%C3%BCrk%C3%A7e+karaoke+%C5%9Fark%C4%B1+indir+bedava PDF link annotation
    • http://sunshinerealestate.org/uploads/1/3/0/5/130588376/javasad-wilizima-lumasebijamafe-jawotodevubobol.pdfIn PDF document text
    • http://everoilpaintings.com/uploads/1/3/0/5/130550732/texuko_dulotet_zabexowinenuk.pdfIn PDF document text
    • http://taylorgantt.com/uploads/1/3/0/6/130639774/2509780.pdfIn PDF document text
    • http://ionahousemidwest.com/uploads/1/3/1/0/131070938/73ad851260c395.pdfIn PDF document text
    • http://influx.ca/uploads/1/3/1/1/131164383/luzodonutomem-jomarekibunotiv-xipefafuxi-liletusiba.pdfIn PDF document text
    • http://easygardensolutions.com/uploads/1/3/0/8/130874517/ritosijibitatekexudu.pdfIn PDF document text
    • http://synergyglobalresearch.com/uploads/1/3/1/4/131407846/a9e44.pdfIn PDF document text
    • http://tbc-om.com/uploads/1/3/0/6/130640101/zenik.pdfIn PDF document text
    • http://gordianvantage.com/uploads/1/3/0/8/130814197/rojemuzojokewokewo.pdfIn PDF document text
    • http://monuem.org/uploads/1/3/1/3/131380993/giwunod_papekuzobezawak.pdfIn PDF document text
    • http://zeezeetravel.org/uploads/1/3/0/6/130621610/4049133.pdfIn PDF document text
    • http://mapcapitalhumano.com/uploads/1/3/0/5/130589245/3981140.pdfIn PDF document text
    • http://theimplementationgroup.net/uploads/1/3/0/5/130590592/vumam.pdfIn PDF document text
    • http://alexandremartorano.com/uploads/1/3/0/2/130289550/zujaz.pdfIn PDF document text
    • http://pinecresthomesinc.com/uploads/1/3/0/6/130639209/11c8be5504.pdfIn PDF document text
    • http://ironstarsolutions.com/uploads/1/3/0/6/130620543/d39f2f6e703.pdfIn PDF document text
    • http://kinslowadvice.com/uploads/1/3/0/6/130621163/kutedipotowid.pdfIn PDF document text
    • http://people2peopleinc.org/uploads/1/3/0/3/130323127/9671497.pdfIn PDF document text
    • http://sqwattsfit.com/uploads/1/3/0/2/130289736/9878f1.pdfIn PDF document text
    • http://tigerlilyyogaseattle.com/uploads/1/3/0/5/130543476/2248276.pdfIn PDF document text
    • http://wayfindingyou.com/uploads/1/3/1/3/131379948/gadasiruku.pdfIn PDF document text
    • http://redmaplecountryclub.com/uploads/1/3/1/3/131379031/d1ba6f47.pdfIn PDF document text
    • http://abhiandaahan.com/uploads/1/3/0/8/130874050/wovonajuzu.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6637 10228 bytes
SHA-256: b9edc592f69dfadb7479d66020e5ecf9de92e7327d86af8cfcd97434446d46ec

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