Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e95febb805b2c51…

MALICIOUS

PDF

45.0 KB Created: 2020-04-04 09:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 957d1219a6252ec79882111987c03c71 SHA-1: ca704dac8d5429de3b895460b917c2a272344db4 SHA-256: 9e95febb805b2c5142ca6f64b03843fb34266c953570e343c71bdbfa02073173
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which are numerically or generically named, suggesting a link farm or SEO manipulation tactic. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with numerous external PDF links hosted on various domains. The document body contains a reference to 'Dewalt 10 inch dual bevel miter saw', which may be a lure to attract clicks to the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kountertops.com/uploads/1/3/0/2/130287441/130287441.html#dewalt+10+inch+dual+bevel+miter+saw PDF link annotation
    • http://headlocks.net/uploads/1/3/1/4/131437677/b980de9e.pdfIn PDF document text
    • http://simco-ip.com/uploads/1/3/0/8/130814017/rudarewuvekolu-pivuxu.pdfIn PDF document text
    • http://h-mconsultants.com/uploads/1/3/0/6/130603861/1272977.pdfIn PDF document text
    • http://jrocha.info/uploads/1/3/0/7/130738693/5149724.pdfIn PDF document text
    • http://fairworks.net/uploads/1/3/0/4/130488544/971020.pdfIn PDF document text
    • http://agiftofmemories.net/uploads/1/3/0/8/130874183/gelenovox_gopanif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: griffinsgoodnews.com 8 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E2 6876 bytes
SHA-256: c6d4ef662c9991b822e57c28903b71bef41aa1f847a33d8b5c0bb476447cd8a4
font_01_sfnt_off00008540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8540 3144 bytes
SHA-256: 2faf3b174afa5eb158d723cfd3ba4e37b4859eff1362dd251119091b4a46f47e
font_02_sfnt_off00009028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9028 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63