Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edd1d48be9dd5cc…

MALICIOUS

PDF

41.0 KB Created: 2020-03-07 23:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1f800aab1944a79d170b77acf4bc8a4b SHA-1: 033f6a8f9dee328c299a40620c35b12c9d9b5e35 SHA-256: 5edd1d48be9dd5cc256c47fa347bc4c576edd35ef844d545250e063205088267
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the sheer volume of external links indicates a malicious intent to direct users to potentially harmful 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://www.let-there-be-history.com/uploads/1/3/0/5/130588731/130588731.html#icd+10+uremic+syndrome
    • http://advancedfitnesstech.com/uploads/1/3/0/6/130622106/9c54a2fe8e.pdf
    • http://ortigroupltd.com/uploads/1/3/0/7/130739873/zukinuwejegogadudadi.pdf
    • http://www.yggjewelsblingboutique.shop/uploads/1/3/0/4/130435712/girorizibom_wevixakit_nuwer.pdf
    • http://thecaptainslady.com/uploads/1/3/0/7/130776561/6a76c8.pdf
    • http://mfgm-produkte.de/uploads/1/3/0/2/130270906/juxizopasuvujata.pdf
    • http://frugal.group/uploads/1/3/0/5/130550944/32576725.pdf
    • http://teacherreisman.com/uploads/1/3/0/6/130620590/1977182.pdf
    • http://galleoneducation.com/uploads/1/3/0/8/130874316/dawobafub.pdf
    • http://ofa-ko.org/uploads/1/3/0/3/130323154/6060729.pdf
    • http://caitlindoula.com/uploads/1/3/0/4/130483147/8116096.pdf
    • http://fivehard.com/uploads/1/3/0/6/130620456/palefotivob.pdf
    • http://mettleheart.com/uploads/1/3/0/8/130813855/4073532.pdf
    • http://mta-sts.jenevervrienden.nl/uploads/1/3/0/4/130435833/e71c1.pdf
    • http://bearsvbabiesgame.com/uploads/1/3/0/2/130271131/c7d1e12cf50.pdf
    • http://9thwonderco.com/uploads/1/3/0/5/130589007/3328038.pdf
    • http://theentitydoctor.com/uploads/1/3/0/4/130435710/8512101.pdf
    • http://www.marcodosantos.com/uploads/1/3/0/4/130477085/fikolopajorexeb.pdf
    • http://safeplacewildlifesanctuary.org/uploads/1/3/0/2/130271094/5936af69.pdf
    • http://sacredhealingintimacy.com/uploads/1/3/0/6/130639175/pinun_lulabofiti_negurodasatif_xasezuselux.pdf
    • http://cancercare4u.net/uploads/1/3/0/5/130545745/zimevususanip-woxogozi-pikogemapes-rutunitekalevo.pdf
    • http://www.thecreditboostgurus.com/uploads/1/3/0/3/130379634/bigigidezape-zuxusosenagusar-gaxonitef.pdf
    • http://jettscreativezone.com/uploads/1/3/0/3/130379206/dilopodulupoto.pdf
    • http://anzik.com/uploads/1/3/0/3/130323424/5495458.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_off00007877.bin
d6957687e4220a72fb041dc0d23b3731ec7a9886f0b379dc7eefcdd936d368d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7877 7700 bytes

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