Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef69754e8a652702…

MALICIOUS

PDF

31.0 KB Created: 2020-03-12 12:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 406e8f3d6a3e9644c5711c227b6d33fd SHA-1: 0c9d516b191bdd8441d655474610fbb8b3e1a006 SHA-256: ef69754e8a652702fe6cc8c228ccc7fce899003cf933820cf50635ff2aae07c2
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are dynamically generated and point to unrelated content, indicating a link farm or SEO poisoning tactic. One of the embedded URLs, 'http://45t34.slpny.com/uploads/1/3/0/9/130969406/130969406.html#abercrombie+and+fitch+jacket+ebay', suggests a lure to a fake shopping result. No scripts were extracted, limiting the analysis of direct malicious actions.

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://45t34.slpny.com/uploads/1/3/0/9/130969406/130969406.html#abercrombie+and+fitch+jacket+ebay PDF link annotation
    • http://restaurant-stadtbad.com/uploads/1/3/0/5/130551008/zotumirasujawa-datimofamokuvib-jebepele-weniz.pdfIn PDF document text
    • http://mfindia.org/uploads/1/3/0/8/130815277/fad2d0.pdfIn PDF document text
    • http://mta-sts.mailserver.teckelgarth.org/uploads/1/3/0/4/130435947/sitawomudiketenaj.pdfIn PDF document text
    • http://iedima.com/uploads/1/3/0/7/130739904/pemedutuvet.pdfIn PDF document text
    • http://organic-marijuana.net/uploads/1/3/0/3/130323249/5557552.pdfIn PDF document text
    • http://meubnb.com/uploads/1/3/0/4/130476940/2451925.pdfIn PDF document text
    • http://franklinlegacyfund.com/uploads/1/3/0/2/130288455/giwonodemowetinote.pdfIn PDF document text
    • http://www.suzannemoran.com/uploads/1/3/0/2/130289628/9076717.pdfIn PDF document text
    • http://mark11machinery.com/uploads/1/3/0/7/130775365/zawot_tusitifatali.pdfIn PDF document text
    • http://completeremodellingsvs.com/uploads/1/3/0/2/130273576/3675282.pdfIn PDF document text
    • http://www.joachim-m-schmidt.com/uploads/1/3/0/2/130289532/3174135.pdfIn 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51CD 7584 bytes
SHA-256: fe538dffb73df9e332448d8c517a14ee91eaca3393b723c6507a800134a78038