Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bff5b88719ee073…

MALICIOUS

PDF

34.3 KB Created: 2020-06-12 03:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 82d46694aa778a6392ad9194d8ba1d1f SHA-1: d5cbc7634809c509b65e730bbcb324cb9dcb7946 SHA-256: 3bff5b88719ee07384fe6b04f7a5cfbb7f89faa7d14e43e3eb089e60347f7789
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The embedded document body also contains several of these URLs, suggesting a deliberate attempt to direct users to a wide array of external content. The primary purpose appears to be SEO manipulation or hosting potentially malicious content across numerous domains.

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://hostmaster.studiofuergestaltung.de/uploads/1/3/0/2/130289344/130289344.html#order+of+operations+worksheets+grade+9 PDF link annotation
    • http://mta-sts.mail.ksrad.org/uploads/1/3/0/6/130639679/wafefudubefi.pdfIn PDF document text
    • http://eibbedpadilla.com/uploads/1/3/0/5/130550758/4800e6735e.pdfIn PDF document text
    • http://myjac.net/uploads/1/3/0/8/130814081/dozijadafekabug.pdfIn PDF document text
    • http://befreeproduction.com/uploads/1/3/1/4/131406837/1808104.pdfIn PDF document text
    • http://trusthomecare.org/uploads/1/3/1/3/131384442/binoni.pdfIn PDF document text
    • http://wholisticgardens.com/uploads/1/3/0/6/130639350/2087889a09c5f1.pdfIn PDF document text
    • http://webmail.folsomlandscapedesign.com/uploads/1/3/1/3/131380109/wizozivotil_simuxeduzuma.pdfIn PDF document text
    • http://rento.de/uploads/1/3/1/8/131871579/2639e.pdfIn PDF document text
    • http://3.undesirable.us/uploads/1/3/0/5/130545818/9625958.pdfIn PDF document text
    • http://2ps.undesirable.us/uploads/1/3/1/8/131872096/gubuzefugikim_gosem.pdfIn PDF document text
    • http://74-123-79-170.mgwnet.com/uploads/1/3/1/6/131606065/kunibakogefasizori.pdfIn PDF document text
    • http://fullyjess.com/uploads/1/3/0/2/130271077/0aa830ba11fef59.pdfIn PDF document text
    • http://sidneyburks.com/uploads/1/3/1/3/131380440/4321691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xowagibiwu.files.wordpress.com/2020/06/lagasofolaxepe.pdfIn PDF document text
    • https://jopawetudame.files.wordpress.com/2020/06/7746450907.pdfIn PDF document text
    • https://daritawaba.files.wordpress.com/2020/06/27913090683.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

Related samples 8

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_off00005b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B36 10200 bytes
SHA-256: f0738e39695b66db596165fee916812d76fb7b94810ae4315b3ff9ed71464c79

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