Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf4f1309a9e2cfd…

MALICIOUS

PDF

35.7 KB Created: 2020-03-31 11:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 70d18583bb797c4891cb0be92441c085 SHA-1: d02253113a947889d4bd6fdf51c4e85b6d702e70 SHA-256: 7bf4f1309a9e2cfdead4bebe6f9573893fd538ea558006c81a9a304aa4f019e4
104 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains references to a 'Sharp roku tv error code 014.30' and a 'Download Now' call-to-action, indicating a lure to download a payload. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jshepherdphotography.org/uploads/1/3/0/5/130550903/130550903.html#sharp+roku+tv+error+code+014.30
    • http://fansteamslegends.com/uploads/1/3/0/9/130969438/webika-moxuboxirox-pibefen-jidozukekagute.pdf
    • http://alwaysondutyhomewatch.com/uploads/1/3/0/6/130620631/zedur.pdf
    • http://kaysemelone.com/uploads/1/3/0/8/130814058/norurimafu.pdf
    • http://scarlettsmagicalcreations.com/uploads/1/3/0/2/130274088/8654368.pdf
    • http://uotservices.com/uploads/1/3/0/4/130490876/4930771.pdf
    • http://laurienommsen-rivers.com/uploads/1/3/0/3/130379479/buwevativu-juriviriz.pdf
    • http://prophetesstonya.org/uploads/1/3/0/9/130969742/6931192.pdf
    • http://encorect.com/uploads/1/3/0/5/130589097/661fe22cdaf3cb.pdf
    • http://communityleadershipinitiative.org/uploads/1/3/0/2/130289540/vapotofa_suxiragonebaro_velilupagal.pdf
    • http://capparelli.net/uploads/1/3/0/8/130873955/9404786.pdf
    • http://zenocse.com/uploads/1/3/0/7/130739105/ledemexe.pdf
    • http://projectangel.solutions/uploads/1/3/0/7/130738553/443364.pdf
    • http://identityclash.com/uploads/1/3/0/4/130476722/2386971.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_off00006476.bin
9a42f18fff413bf8834a51310fa19aadceafa3e2abdedaae04774b7fa62ff871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 7544 bytes

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