Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aee486225655f70…

MALICIOUS

PDF

35.1 KB Created: 2020-04-02 17:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4422bde5150fb112c02ca93354e9cb9 SHA-1: 6b4724fb1a1ef3b0b8fe521ec4732107a4facbe4 SHA-256: 2aee486225655f702a99f3f5c84d55376a938ef93a9ad2d7e8986b20a1034820
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The document body, while partially corrupted, contains text related to unit conversion and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

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://marconettzoo.com/uploads/1/3/0/7/130740612/130740612.html#convertisseur+heure+d%C3%A9cimale+en+heure+minute
    • http://changinglaneswithmslinda.com/uploads/1/3/0/2/130288545/sikakimasimeni.pdf
    • http://drheidif.net/uploads/1/3/0/5/130551050/genovubinawige.pdf
    • http://donikamiller.com/uploads/1/3/0/3/130323110/dofolisuwul.pdf
    • http://aeshsbands.org/uploads/1/3/0/6/130604515/6b0fd30a7e98.pdf
    • http://zenwich.co/uploads/1/3/1/0/131070045/gemateg.pdf
    • http://workconnectstaffingservices.com/uploads/1/3/1/1/131163590/fasegurexug.pdf
    • http://collectivevisionsolutions.com/uploads/1/3/0/2/130289670/8468967.pdf
    • http://touchstoneadvisoryconsulting.com/uploads/1/3/0/6/130639510/9389f5.pdf
    • http://servingnashville.com/uploads/1/3/0/7/130738721/3effab98e32.pdf
    • http://shopbeautifulboutique.com/uploads/1/3/0/7/130775162/lupom_dabikukode_bonebulo_sovowufetuvape.pdf
    • http://semperfivet.com/uploads/1/3/1/1/131163878/6358229.pdf
    • http://consulatcotedivoire.com/uploads/1/3/0/2/130273578/gisijima.pdf
    • http://timertecnologia.com/uploads/1/3/0/3/130323255/2566937.pdf
    • http://metrixoas.com/uploads/1/3/0/6/130621378/xobavi.pdf
    • http://mx1.allegro-as.no/uploads/1/3/0/7/130738548/c57f4f.pdf
    • http://nonstopservices.org/uploads/1/3/0/5/130547659/6228761.pdf
    • http://krmenterprise.com/uploads/1/3/1/1/131164542/nonusedebon.pdf
    • http://hinisha.com/uploads/1/3/1/0/131070602/8552547.pdf
    • http://summerinternstb.com/uploads/1/3/0/7/130775921/4554828.pdf
    • http://gifttherapybynola.com/uploads/1/3/0/5/130545957/mopuzofukegede-xedaxax-ketarowig.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_off00005e74.bin
ea4ad36afb9bc31bd5e3eb3de928b83d198d5b8f0d76368cde5fe98c27d8c80f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E74 8060 bytes