Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfd946b1e24fd6a…

MALICIOUS

PDF

39.7 KB Created: 2020-03-24 22:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4b7220158550b00d20b96140d2cebade SHA-1: 91aad1d40f6a85ba10ff1d57560c741d40d09710 SHA-256: 0cfd946b1e24fd6a34daca5242f661f62d2603248fb7f9bcc9803af45894c548
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains URLs that are part of this link farm. This suggests the document is likely part of a link farm or SEO spam campaign, potentially used to distribute malware or engage in phishing.

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://misbailes.com/uploads/1/3/0/6/130604765/130604765.html#como+hacer+arboles+de+carton+para+escenografia
    • http://mgpsfm.com/uploads/1/3/0/2/130289172/bb1fe9.pdf
    • http://crans-montana-luxury-apartment.com/uploads/1/3/0/8/130873983/pazugawisi.pdf
    • http://nadiaprice.com/uploads/1/3/0/4/130483806/829583.pdf
    • http://labsalonandbrowstudio.org/uploads/1/3/0/7/130740000/sofarukeviz_bezagawavoti.pdf
    • http://efoodville.com/uploads/1/3/0/3/130323362/lowem.pdf
    • http://mta-sts.mail.amyreading.com/uploads/1/3/0/4/130488446/2917411.pdf
    • http://www.sooiwasthinking.com/uploads/1/3/0/9/130969146/723420.pdf
    • http://affordable-inflatables.com/uploads/1/3/0/5/130538981/f1307221a1c.pdf
    • http://sandravincentsart.store/uploads/1/3/0/5/130546290/6a76aa.pdf
    • http://aaagospelminister.com/uploads/1/3/0/4/130476652/bomojuxori.pdf
    • http://jonesborosp.com/uploads/1/3/0/7/130776787/e7f50.pdf
    • http://missoulaautoglassonline.com/uploads/1/3/0/6/130621525/970e58e7761119.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_off00006e0c.bin
a4b0bbca794192b5637ee579e829bcab025be7f804a2c421f8939e4f3f0e65de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 9512 bytes

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