Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9c2bca46258d2b…

MALICIOUS

PDF

52.6 KB Created: 2020-03-27 02:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4d953ac38793853652a8609c5797fc98 SHA-1: 13a1ceb64df8096faab398f03128afefc452590c SHA-256: 2c9c2bca46258d2b94df0f30e87c06786e75dd525d5caec1ff541d927c101b24
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body itself contains text related to linguistic signs and the authoring application, but the primary malicious activity appears to be the mass of embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://2020blue.org/uploads/1/3/0/6/130604892/130604892.html#el+signo+linguistico+es+convencional PDF link annotation
    • http://azaharaong.com/uploads/1/3/0/5/130551429/9cb5c292954c9d.pdfIn PDF document text
    • http://ldroman.com/uploads/1/3/0/4/130476594/d6042fe4f0567dd.pdfIn PDF document text
    • http://hostmaster.thehitmill.com/uploads/1/3/0/2/130274330/3961935e1aa8bd4.pdfIn PDF document text
    • http://womblemonster.com/uploads/1/3/0/6/130622042/3269512.pdfIn PDF document text
    • http://m.lawhorncarinsurance.com/uploads/1/3/0/7/130739224/400906f05.pdfIn PDF document text
    • http://mail.rpjandco.com/uploads/1/3/0/4/130488615/rusunu.pdfIn PDF document text
    • http://brismakingchanges.com/uploads/1/3/0/6/130605133/sajovadi.pdfIn PDF document text
    • http://mail.c3power.org/uploads/1/3/0/6/130604580/8b76734.pdfIn PDF document text
    • http://privacypolicypetition.org/uploads/1/3/0/4/130483194/gigem_puxifugikode.pdfIn PDF document text
    • http://missstewartsailors.com/uploads/1/3/0/5/130590511/mupojiwaji_kuwofatetuwaw_nogezawikevu.pdfIn PDF document text
    • http://mollybrave.net/uploads/1/3/0/2/130288506/47065fc5dad5.pdfIn PDF document text
    • http://mmareport.net/uploads/1/3/0/4/130436252/4983412.pdfIn PDF document text
    • http://mta-sts.fw1a.davidandnordely.com/uploads/1/3/0/6/130639107/3578317.pdfIn PDF document text
    • http://bombcakesnw.com/uploads/1/3/0/6/130620172/dokisajoseneses.pdfIn PDF document text
    • http://roosfotografie.com/uploads/1/3/0/4/130488924/6173576.pdfIn PDF document text
    • http://speechninja.net/uploads/1/3/0/6/130639145/1967025.pdfIn PDF document text
    • http://christensensmobiledetail.com/uploads/1/3/0/9/130969438/baluxugafak.pdfIn PDF document text
    • http://www.peristorm.com/uploads/1/3/1/1/131164460/098b537633e.pdfIn PDF document text
    • http://tecfrico.com/uploads/1/3/0/8/130814308/5019890.pdfIn PDF document text
    • http://www.alessandrocavallin.com/uploads/1/3/0/8/130873975/d2321b41f7de35d.pdfIn PDF document text
    • http://valuebg.com/uploads/1/3/0/9/130969987/pisafijanexog.pdfIn PDF document text
    • http://clubboesche.com/uploads/1/3/0/4/130483539/tulezezijonepud_simozava_temuk.pdfIn PDF document text
    • http://www.therollingstovesllc.com/uploads/1/3/0/6/130620803/7957970.pdfIn PDF document text
    • http://hondumexframingllc.com/uploads/1/3/0/6/130639845/9169630.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000082bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 9232 bytes
SHA-256: 2fd359c2dd4021f10018aaa62748fcce071552fe58767ada01e6c6f60542b258
font_01_sfnt_off0000a421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA421 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0000ad88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD88 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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