Malicious PDF — malware analysis report

Static analysis result for SHA-256 208209738242fdba…

MALICIOUS

PDF

63.2 KB Created: 2020-04-17 01:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 4645cec1dfe9a151c85623912b007af7 SHA-1: 887c2d298cc265d3a51824e2c99c333273fad265 SHA-256: 208209738242fdba784a617faa3dccba51ec0afb66d07033aafcd40227558cb2
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to distribute malicious content or redirect users to phishing sites. The embedded URL also points to a potentially malicious domain. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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://ellaabad.com/uploads/1/3/1/4/131407796/131407796.html#uniformly+accelerated+rectilinear+motion PDF link annotation
    • http://commonsensefromthebigsky.com/uploads/1/3/0/5/130544091/2606394.pdfIn PDF document text
    • http://cerberuscanecorso.com/uploads/1/3/0/6/130621060/8477217.pdfIn PDF document text
    • http://palmettostarbbq.com/uploads/1/3/0/5/130544447/4726216.pdfIn PDF document text
    • http://blesscedbeads.com/uploads/1/3/1/4/131437844/5402017.pdfIn PDF document text
    • http://cherylscornorcafe.com/uploads/1/3/1/4/131482975/6420047.pdfIn PDF document text
    • http://fictionalbookshop.com/uploads/1/3/1/4/131406437/mewew.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://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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: propertymaintenancellc.net 3 samples

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B15 6300 bytes
SHA-256: c7cb6cabcdec329c17140f6a0be3c30613e831ff05c138b4eb720e2922c8da49
font_01_sfnt_off0000aa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA39 9252 bytes
SHA-256: a56a7da0345e125c9ed82b7fe962f4dd365b91798d85a893c95f878969d918ce
font_02_sfnt_off0000cdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 3652 bytes
SHA-256: b96082e3433b28199656468a12432325c05a7b639494d53b9ac2ae82895c8ff8
font_03_sfnt_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 16096 bytes
SHA-256: 0720090508793ef8b34031fd231100a5fac87d4204db81b048de67b53a523898

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