Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bd06983f116772…

MALICIOUS

PDF

37.1 KB Created: 2020-04-06 15:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 092dd9805e95764bd280ae4853da3bbd SHA-1: 1ecf545e1bcb9d361b4a1ce16a265aa9ac7eda27 SHA-256: 56bd06983f116772312f742cdcaf7fe861293108379979e04a6ed590d1192660
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Virginia beach beachfront vacation rentals'. The primary attack pattern involves redirecting users to a link farm, 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://fundraisers-aylsham.com/uploads/1/3/1/3/131398487/131398487.html#virginia+beach+beachfront+vacation+rentals
    • http://breasthealthconsulting.com/uploads/1/3/0/6/130639227/gilinuw.pdf
    • http://kieferdowdyphotography.com/uploads/1/3/0/6/130620848/wopok.pdf
    • http://introligatornia-katowice.pl/uploads/1/3/0/6/130640109/juvul.pdf
    • http://thecrannygroup.com/uploads/1/3/0/9/130969027/ca7156431ae3780.pdf
    • http://diamonddiva.club/uploads/1/3/0/4/130488503/1358963.pdf
    • http://oregonap.com/uploads/1/3/1/0/131069789/d36bde.pdf
    • http://gracefuldiva.com/uploads/1/3/0/7/130739313/gegunaviwuma-pifejegesalum-zusozajekoni.pdf
    • http://afsprakenplanner.be/uploads/1/3/0/6/130604844/baguwaju.pdf
    • http://lytlifestyle.com/uploads/1/3/0/6/130639656/motixer_piruv_kolabosa.pdf
    • http://telsaelectricfestival.com/uploads/1/3/1/1/131164372/kakufurejure.pdf
    • http://whitparker.com/uploads/1/3/0/5/130588185/dumoxetozivutaru.pdf
    • http://bbonline.shop/uploads/1/3/0/7/130775033/nizetegeniw.pdf
    • http://nospaganconsulting.com/uploads/1/3/0/8/130874143/bexeruzifi-modofif-vodetotuv-natuko.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_off00006818.bin
e0b77c0467e7ca35eea918c8972c25ed75c6ebb15263910495aaa425e1c9a561		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6818 7452 bytes

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