Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a43fd9923afffae…

MALICIOUS

PDF

30.4 KB Created: 2020-04-17 10:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 132222959d9a418906944e2ab999d4f9 SHA-1: dc29648d8b9b1c953de2415508d15a427efa69cb SHA-256: 5a43fd9923afffaeeb6b5e6d25b681722a106c7f8c8737f82da98211adca7ef8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF links, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie search. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards an attempt to redirect users to potentially harmful content or phishing sites.

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://agpmav.com/uploads/1/3/0/7/130775115/130775115.html#rupinder+gandhi+movie++hd+full
    • http://hopewellhousingltd.com/uploads/1/3/0/3/130323568/edb14c80b8c.pdf
    • http://lbardranch.com/uploads/1/3/1/6/131606261/venakiji_xufupamuka_butova_futakud.pdf
    • http://tysconcessions.com/uploads/1/3/0/6/130620975/pavugodewavusikusoz.pdf
    • http://yuweipipes.com/uploads/1/3/0/8/130874680/gudowojoridigud_datogadizezek_kurabojob.pdf
    • http://stuccoveneziano.ro/uploads/1/3/0/9/130969357/dazupakod-papijajo-gorevujexefemi.pdf
    • http://attawayserviceselectrical.com/uploads/1/3/0/3/130313826/6df43928a62b.pdf
    • http://sparklingpolish.net/uploads/1/3/0/4/130477228/lajeme.pdf
    • http://keepaustinmodified.com/uploads/1/3/0/5/130550871/gevobafukowojofasil.pdf
    • http://minutodecoracao.com/uploads/1/3/1/3/131379940/e646e8b.pdf
    • http://brookebilbrey.com/uploads/1/3/0/3/130379548/komima.pdf
    • http://mrshoeamerica.com/uploads/1/3/0/7/130739934/5301516.pdf
    • http://bullardpatents.com/uploads/1/3/0/6/130603942/larupiwofezelopimod.pdf
    • http://bellzfashioninc.com/uploads/1/3/1/3/131379738/563900a5c.pdf
    • http://rightmixstrip.com/uploads/1/3/0/5/130551625/watoju.pdf
    • http://theatertok.be/uploads/1/3/0/7/130739122/6107824.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_off00005221.bin
b003ba28c50fe838211a3af5f943a783a20750dd5753057cfbf1ec4fddaef1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5221 6844 bytes

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