Malicious PDF — malware analysis report

Static analysis result for SHA-256 2501385895ba8808…

MALICIOUS

PDF

50.0 KB Created: 2020-03-29 04:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b90c408569ede4f19f26ece03bd8091d SHA-1: 46b4313c94414ecaf6f795f2381bff692dcd86a7 SHA-256: 2501385895ba8808f0c8c385c7185da44961e40651c39df38971410e6e3e8317
92 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to these external URLs, suggesting a coordinated effort to direct users to a multitude of other PDF documents. The primary purpose appears to be SEO manipulation or the distribution of further malicious content via these linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://michaudwellness.com/uploads/1/3/0/3/130324011/130324011.html#que+tipos+de+fronteras+existen+en+mexico
    • http://www.pakmanmusik.com/uploads/1/3/0/6/130605244/13422d11.pdf
    • http://www.smartofficeinteriorsinc.com/uploads/1/3/0/4/130476146/d660217049209.pdf
    • http://tangsoodotournaments.com/uploads/1/3/0/6/130620966/867370d19bb6c89.pdf
    • http://www.prettypextensions.net/uploads/1/3/0/7/130740001/tiwokukepepof.pdf
    • http://empty-ideas.com/uploads/1/3/0/5/130551153/f1ab0.pdf
    • http://katyspratt.com/uploads/1/3/0/7/130739349/dawakikofuvojapar.pdf
    • http://daarna.be/uploads/1/3/0/7/130739845/3216035.pdf
    • http://hostmaster.inertiastructures.com/uploads/1/3/0/2/130289748/7141438.pdf
    • http://tunagehigh.com/uploads/1/3/0/5/130539800/5014b.pdf
    • http://blackpoolwebfestival.com/uploads/1/3/0/8/130874559/duzetogabi_futul.pdf
    • http://noahdebiase.com/uploads/1/3/0/4/130494801/nivofam_lawigaf_wesoxokulabogug_roxewi.pdf
    • http://tastydairy.club/uploads/1/3/0/5/130539888/862799.pdf
    • http://crossroadseastnorthport.com/uploads/1/3/0/5/130545278/2482030.pdf
    • http://americankenneldogpapers.com/uploads/1/3/0/6/130640057/minatoko.pdf
    • http://eso-radio.com/uploads/1/3/0/7/130739720/263467.pdf
    • http://knotyourthoughts.site/uploads/1/3/0/4/130435943/zexoxatedupobox_mawag_ponopofuz_mixukep.pdf
    • http://agoldensbergllc.com/uploads/1/3/0/9/130969340/lifaraju.pdf
    • http://milesoftraining.com/uploads/1/3/0/3/130313306/koxisifib.pdf
    • http://senegaljaunecoeur.com/uploads/1/3/0/3/130313466/wisuluralokesuwozix.pdf
    • http://www.johnrrogers1969.com/uploads/1/3/0/3/130312952/gadif-rulifolixer.pdf
    • http://mindmeetscanvas.com/uploads/1/3/0/5/130543878/3983490.pdf
    • http://www.studio-505.com/uploads/1/3/0/3/130323178/bupovirasel.pdf
    • http://pintsizechef.com/uploads/1/3/0/2/130272937/zazirazerowuti_zemoxa_wejananitox_dadejotin.pdf
    • http://womersleyenvironmentalservices.com/uploads/1/3/0/9/130970015/piwadibatoviz_jopotugedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a77.bin
dab95b87649a1e6a40be36c70cf4b9807aa6bbe2823f36e1cdcc15b531e29514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A77 8504 bytes
font_01_sfnt_off000099a4.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99A4 2652 bytes
font_02_sfnt_off0000a30b.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA30B 16036 bytes

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