Malicious PDF — malware analysis report

Static analysis result for SHA-256 089f1cb8f12e5832…

MALICIOUS

PDF

83.6 KB Created: 2020-04-07 21:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b1ffbd47c33b5d9ba797842dd8cdbcc SHA-1: 9007f520c0eff61c8866031a93f2180fe0311bd1 SHA-256: 089f1cb8f12e583286ca4e419b3a8bb6f4c5e58a5308d9e7205a120b9fe6329c
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to PDF files hosted on unrelated domains, suggesting a link farm or SEO spamming tactic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users seeking a 'parts manual'. The presence of many external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to malicious websites or phishing pages.

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://toplinekitchencabinetsinc.com/uploads/1/3/0/7/130775280/130775280.html#hpi+wheely+king+parts+manual
    • http://gottohaveitboutique.com/uploads/1/3/0/7/130739212/5749005.pdf
    • http://announceful.com/uploads/1/3/0/9/130969740/fajixegab_salavipadodomiw_najakubumizebiz.pdf
    • http://citylightsremix.com/uploads/1/3/0/4/130477915/kubup.pdf
    • http://reddogcounselling.com/uploads/1/3/0/7/130738812/6254199.pdf
    • http://seminariosmetodoyuen.com/uploads/1/3/0/8/130814009/c3c4769fdf5ad8.pdf
    • http://thesupplyguys.org/uploads/1/3/0/7/130739437/juxutoxonuraz.pdf
    • http://theartofsexualsatisfaction.com/uploads/1/3/0/4/130483346/fb0670.pdf
    • http://junkcarsncash.com/uploads/1/3/0/6/130640063/12106.pdf
    • http://mdfamilycare.net/uploads/1/3/0/5/130550655/ravegulaved.pdf
    • http://cdontigny-teamd.ca/uploads/1/3/0/7/130740048/tibidope_fazatu.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_off00011ea3.bin
3b2f65345135942004992765b17dc5866d4356452f80d1dc5df522991b0d1dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA3 9100 bytes

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