Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd26b7f839b68b10…

MALICIOUS

PDF

35.8 KB Created: 2020-06-05 16:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 4099124e0b23dd3419da42c113f108cb SHA-1: f82595aa87254f6151f48c219f4eb9e52083d2ff SHA-256: cd26b7f839b68b10ada6b7613f67c4c83ca179914ca746d11801cae857f3413b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body mentions 'P90x free download', suggesting a lure to trick users into clicking these links. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of generated SEO links, reinforcing the malicious intent of distributing links to potentially harmful content. No scripts were extracted from this sample.

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://rv1.voyagerwebsites.com/uploads/1/3/0/6/130605325/130605325.html#p90x+free+download PDF link annotation
    • http://foobur.com/uploads/1/3/0/4/130483086/narukabazipe.pdfIn PDF document text
    • http://pamelacote.com/uploads/1/3/0/8/130813997/5674499.pdfIn PDF document text
    • http://orlandoflweddingphotographers.com/uploads/1/3/0/4/130483204/27266fd0.pdfIn PDF document text
    • http://choclity.com/uploads/1/3/0/3/130379319/2266851b480cf4.pdfIn PDF document text
    • http://mta-sts.mx.wallingfordanddidcotosteopathy.com/uploads/1/3/0/6/130621125/nubusixinutexijopawo.pdfIn PDF document text
    • http://kdv-kidshome.nl/uploads/1/3/1/3/131398117/xibesesafomirox.pdfIn PDF document text
    • http://eurythmy-at-home.com/uploads/1/3/0/7/130740097/fotoxot-xoxokor-powitisesemozi.pdfIn PDF document text
    • http://pro360security.net/uploads/1/3/1/8/131856257/59690.pdfIn PDF document text
    • http://do-protect.com/uploads/1/3/1/4/131453539/norufuvixidoril_jukadotixu_wopuz.pdfIn PDF document text
    • http://74-123-75-166.mgwnet.com/uploads/1/3/0/5/130540619/xavesavizitegagugofa.pdfIn PDF document text
    • http://twofatolives.com/uploads/1/3/0/6/130604780/d3a3a5bc26cc9af.pdfIn PDF document text
    • http://rv1.voyagerwebsites.com/uploads/1/3/0/6/130605325/terms.htmlIn PDF document text
    • http://rv1.voyagerwebsites.com/uploads/1/3/0/6/130605325/dmca.htmlIn PDF document text
    • http://rv1.voyagerwebsites.com/uploads/1/3/0/6/130605325/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wukajex634484872.files.wordpress.com/2020/06/62397761575.pdfIn PDF document text
    • https://zapagupita.files.wordpress.com/2020/06/nikitosalusexogen.pdfIn PDF document text
    • https://dulibigimum.files.wordpress.com/2020/06/940211098.pdfIn PDF document text
    • https://kebesunaxi.files.wordpress.com/2020/06/1207897113.pdfIn PDF document text
    • https://dakisil.files.wordpress.com/2020/06/pepejofarodavumatoti.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
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E50 9224 bytes
SHA-256: 16fa0231369ea446dba157f46d3dd059256bd4fbe5157d3f3413d8762d9934f2
font_01_sfnt_off00006e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E26 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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