Malicious PDF — malware analysis report

Static analysis result for SHA-256 30972d50d9870a78…

MALICIOUS

PDF

39.5 KB Created: 2020-04-05 08:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d18ddbdaed0cbf69491fc8c4f0d88aa2 SHA-1: 3f1eb54eaa6409f3e83d4d10dbdf58935e66ae73 SHA-256: 30972d50d9870a783d67ff241f84ae2210757bb516b59166689e670c6f0388b3
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to direct users to potentially malicious content. The document body, though partially obfuscated, contains text related to a 'certificate of police background' and includes URLs that likely serve as lures. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

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://newjerseyhomebuyerseminar.com/uploads/1/3/0/8/130873912/130873912.html#modelo+de+certificado+de+antecedentes+policiales+peru
    • http://bsp500.org/uploads/1/3/1/4/131453455/nezonagusim.pdf
    • http://orulaweb.com/uploads/1/3/0/2/130291371/3cdda.pdf
    • http://abigailklassen.com/uploads/1/3/0/5/130540097/6445718.pdf
    • http://jamiegift.com/uploads/1/3/1/0/131070527/b1322890d0921d.pdf
    • http://dmcappraisals.com/uploads/1/3/0/6/130604202/9460183.pdf
    • http://lauraannspaeth.com/uploads/1/3/0/7/130775536/6651239.pdf
    • http://unbrandedwear.com/uploads/1/3/0/7/130739651/baked.pdf
    • http://braveadventurer.com/uploads/1/3/0/9/130969999/fodomimekifumujodo.pdf
    • http://able2bcounseling.com/uploads/1/3/0/7/130776035/2264622.pdf
    • http://curryhut.net/uploads/1/3/0/9/130969313/3740250.pdf
    • http://cutleryclubofamerica.com/uploads/1/3/0/5/130540352/bomuwamezeduzudoz.pdf
    • http://lospaelleros.com/uploads/1/3/0/9/130969419/wexosuludiko_zurakemifedesa_mikesiweva_pepatososewifa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f86.bin
f1dbef70120c50e9449847c34b39ba0fc64eee3e87efcdeb575bf87379360af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 8648 bytes

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