Malicious PDF — malware analysis report

Static analysis result for SHA-256 d485420c6d7cb580…

MALICIOUS

PDF

32.0 KB Created: 2020-04-26 07:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fc5e3f78f88bb0c74ec8b142906e3c17 SHA-1: 2c0a906ab37d80355a855f158d9cfb8683433cc1 SHA-256: d485420c6d7cb580ca07952aa1caacb114708aa25ef5eb46b2ed982ccc06833f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links, a common technique for SEO poisoning and phishing. The document body, though heavily obfuscated, contains references to 'Directv filipino channels guide' and embedded URLs, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of specific behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://moodlabnewlife.nl/uploads/1/3/1/3/131381376/131381376.html#directv+filipino+channels+guide
    • http://complimaxllc.com/uploads/1/3/1/4/131407036/8ffbe38c3a4.pdf
    • http://chateauquelennec.com/uploads/1/3/0/5/130551486/21fa22d2920.pdf
    • http://gypsywindrvrentals.com/uploads/1/3/0/3/130313015/silize-gonut-wiliwal.pdf
    • http://mvisionconstruction.com/uploads/1/3/0/4/130476146/levemi.pdf
    • http://treatsmn.shop/uploads/1/3/1/3/131398259/bejowu_miramawamosivim_jejaduk_mupodojajetafu.pdf
    • http://savage-adventures-with-olivia.com/uploads/1/3/0/2/130271137/poguvatelamufakew.pdf
    • http://apexninjutsu.net/uploads/1/3/1/4/131455158/cc6fde3bd492.pdf
    • http://vancouvertourism.ca/uploads/1/3/0/4/130490488/8f22494d10a82f.pdf
    • http://jmlcleaningservicesllc.com/uploads/1/3/0/3/130324385/pemokuvaxesoxi.pdf
    • http://holysolar.net/uploads/1/3/1/4/131455825/0e0d74ba809ca27.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_off00005546.bin
10210fb450e7c2024c99f7b7a6008ce9f70792490d3ac11b8f722456b5e78ded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5546 7852 bytes

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