Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc1d34dc5fcf39e…

MALICIOUS

PDF

31.8 KB Created: 2020-06-07 21:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce28e6725daee9701f1a5a567b33517a SHA-1: c4f41bd4ca67cc49ff3179882e9b281c9c74ff35 SHA-256: 3cc1d34dc5fcf39eae3c50f0d2c1650860fea29075490a02d46f516e360abb9d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm or SEO manipulation scheme. The document body itself is heavily obfuscated but contains URLs that are likely intended to redirect users to malicious content or phishing pages. The ML classifier strongly indicated maliciousness, supporting the assessment of a link-based attack.

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://49r.undesirable.us/uploads/1/3/0/7/130740183/130740183.html#james+stewart+calculo+de+varias+variables+pdf
    • http://eyecareoptometriccenter.com/uploads/1/3/0/6/130603946/8201919.pdf
    • http://freshloconvening.org/uploads/1/3/0/5/130589385/4820384.pdf
    • http://ullimcart.shop/uploads/1/3/0/6/130639438/xojaparob.pdf
    • http://dylanathon.com/uploads/1/3/0/6/130605270/ridozeru.pdf
    • http://honeyhills.net/uploads/1/3/0/6/130604473/fegatozojifetu.pdf
    • http://akilinc.com/uploads/1/3/0/9/130969842/wevudejidis.pdf
    • http://insideoutholistichealth.com/uploads/1/3/1/3/131380470/xuvifirimeruxane.pdf
    • https://fakovok.files.wordpress.com/2020/06/jometogojilirebuwom.pdf
    • https://buviwejurofo.files.wordpress.com/2020/06/wividirozibo.pdf
    • https://mutejebin523327901.files.wordpress.com/2020/06/jokupifanunalotesawo.pdf
    • https://bezifunija.files.wordpress.com/2020/06/pifudobapodadip.pdf
    • https://daxetojip161513793.files.wordpress.com/2020/06/lunavorenu.pdf
    • https://fagirixol.files.wordpress.com/2020/06/68905365974.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_off0000509f.bin
be65dd0cd1cc4f11607e0a1c1a714eab3cd52bc406ee40cd0f9debb73224c957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x509F 10636 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.