Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb03aa86ab16226…

MALICIOUS

PDF

37.8 KB Created: 2020-03-21 11:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: f6efc57d5189be9e61b727e5e064143f SHA-1: 7e5d58954c2fa8a1bf68a603c1476eacd4bdaa90 SHA-256: 9fb03aa86ab1622643233488ba144f38cd4f820ba4b5593fe7d861e57a0a2a79
116 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 by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://lombard-global-trading.com/uploads/1/3/0/6/130639565/130639565.html#calcular+el+area+sombreada+del+cuadrado, appears to be part of a link farm designed to manipulate search engine results or direct users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://lombard-global-trading.com/uploads/1/3/0/6/130639565/130639565.html#calcular+el+area+sombreada+del+cuadrado PDF link annotation
    • http://broadtec.com/uploads/1/3/0/7/130740221/derazu.pdfIn PDF document text
    • http://www.stitchlondon.com/uploads/1/3/0/5/130550992/6922723.pdfIn PDF document text
    • http://cfbmediation.com/uploads/1/3/0/7/130739731/3368579.pdfIn PDF document text
    • http://www.abramengineering.com.au/uploads/1/3/0/6/130605517/5379368.pdfIn PDF document text
    • http://viewmoral.com/uploads/1/3/0/2/130291822/71ce7eec0e.pdfIn PDF document text
    • http://smbwineboutique.com/uploads/1/3/0/6/130639592/0606061461adc.pdfIn PDF document text
    • http://baddazzbikes.com/uploads/1/3/0/6/130620840/3550495.pdfIn PDF document text
    • http://litfriendscandles.com/uploads/1/3/0/7/130738918/4da4c3.pdfIn PDF document text
    • http://representacoespicinin.com/uploads/1/3/0/6/130620391/minutozaxo.pdfIn PDF document text
    • http://pieterwuille.com/uploads/1/3/0/9/130969673/sidifutowiworomawe.pdfIn PDF document text
    • http://johnisnaked.com/uploads/1/3/0/2/130289271/7bafec821d8c32.pdfIn PDF document text
    • http://fbcsavmo.org/uploads/1/3/0/7/130739164/bcf54bc6.pdfIn PDF document text
    • http://getzoinked.com/uploads/1/3/0/8/130873906/2193918.pdfIn PDF document text
    • http://mta-sts.mail.scmflourish.com/uploads/1/3/0/7/130739747/dunoz.pdfIn PDF document text
    • http://kmdmoney.com/uploads/1/3/0/2/130272428/2131597.pdfIn PDF document text
    • http://kinseylloydltd.com/uploads/1/3/0/3/130313686/gexinagadadeze.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 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_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 8524 bytes
SHA-256: 3be1c2e9c3fd5a4dac300f35010d06b5212bf3898cab0334edd9c82298623a96

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