Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be0c7c70abc7751…

MALICIOUS

PDF

38.1 KB Created: 2020-03-10 09:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0e5aba84c4bbb079b5126e6910f75c52 SHA-1: 3325a6780576dd4b403eaa684b9770a74dac4eb5 SHA-256: 0be0c7c70abc7751a1c22e5b3263c4336f8f1e5179d23be5548e939b127d0250
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though malformed, contains references to the URLs, suggesting a lure to external content. The primary attack pattern involves directing users to potentially malicious websites through a link farm.

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://fantasticcruises.voyagerwebsites.com/uploads/1/3/0/6/130620150/130620150.html#combining+multiple+jpegs+into+one+pdf+mac
    • http://right-way-shuttle.com/uploads/1/3/0/3/130313454/tuwawir_pubexujebitu.pdf
    • http://www.mobilebrakescornwall.com/uploads/1/3/0/2/130289494/peronem.pdf
    • http://www.toietmoiesthetics.ca/uploads/1/3/0/5/130550704/2230758.pdf
    • http://literaturepsychology.com/uploads/1/3/0/6/130640194/5470091.pdf
    • http://lobstermatt.com/uploads/1/3/0/5/130540083/de7103085e0f0c3.pdf
    • http://mhconstruction-nj.com/uploads/1/3/0/6/130604541/9766605.pdf
    • http://centralathletic.com/uploads/1/3/0/6/130621614/mexovikesojareme.pdf
    • http://depthstiny.com/uploads/1/3/0/3/130379821/5115445.pdf
    • http://mmcarterconsult.com/uploads/1/3/0/6/130621656/882ee17d.pdf
    • http://alhooper.people.ua.edu/uploads/1/3/0/7/130775715/2d814ef4bd1b833.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_off00006c55.bin
0ba53a106324fe86e10947e59c999ff0ed096278fae7820bd142ce806c178b79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C55 8036 bytes

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