Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bb81c3e18fcb982…

MALICIOUS

PDF

41.6 KB Created: 2020-03-17 04:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1069e53a81967a1e26a65a1d63bb1929 SHA-1: c0c6dab26127bf9ccbef6c4301288818a106f291 SHA-256: 5bb81c3e18fcb982e127262605951e7165613b8ada2353e8c758c23fd66083c9
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a PDF link farm. The primary URL points to a page with a title suggesting a movie download, likely a lure. While no scripts were explicitly extracted, the heuristic firings and the nature of the embedded links suggest an attempt to redirect users to potentially malicious content or for SEO manipulation. The ML classifier strongly indicates maliciousness.

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://navice.org/uploads/1/3/0/2/130274028/130274028.html#captain+underpants+the+first+epic+movie+hindi+dubbed+download
    • http://www.austenhohendorf.com/uploads/1/3/0/2/130289801/disopefifuri.pdf
    • http://moabgearheads.com/uploads/1/3/0/2/130289294/sudavi.pdf
    • http://kazang.org/uploads/1/3/0/2/130289254/lijezalinawudare.pdf
    • http://hamsamama.com/uploads/1/3/0/5/130538946/nevuwozexinunap.pdf
    • http://three54.com/uploads/1/3/0/7/130775009/ferisajeg_zusonudagojut_sivozovuwi.pdf
    • http://foodtruckclassifieds.com/uploads/1/3/0/5/130551726/956c75dfaa3.pdf
    • http://animatedhobbies.com/uploads/1/3/0/5/130539205/6811775.pdf
    • http://www.jokatywelch.com/uploads/1/3/0/7/130776114/4818698.pdf
    • http://www.worldviewschoolofherbalarts.com/uploads/1/3/0/5/130540874/84937b5b31cd.pdf
    • http://kingswaycruising.co.uk/uploads/1/3/0/3/130323124/vapawesapaw.pdf
    • http://hannahyoung.org/uploads/1/3/0/4/130476143/rageremunojuza.pdf
    • http://www.alrightshoppers.com/uploads/1/3/0/6/130621003/454fe7d6778b9c.pdf
    • http://oceanviewchristian.com/uploads/1/3/0/6/130620929/3686641.pdf
    • http://ekcoelearningcommons.com/uploads/1/3/0/4/130476045/94587b03b.pdf
    • http://www.giftsnobs.com/uploads/1/3/0/2/130287281/setupirulisadu.pdf
    • http://logicaldesigner.net/uploads/1/3/0/7/130776720/d9153b7aca.pdf
    • http://mta-sts.mail.gigiguthrie.com/uploads/1/3/0/5/130540209/37786.pdf
    • http://silvertipgroup.com/uploads/1/3/0/6/130621630/sikebu-seraduteletode-jisunijavovukum.pdf
    • http://www.livetherefinedlife.com/uploads/1/3/0/8/130813592/kekutera.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_off000077b2.bin
e5c63cd35c329fcf7fdffc1a89eff5feba93637aa5bbf6276588730958bff2b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 8620 bytes