Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c328fcf9db0a5e…

MALICIOUS

PDF

32.0 KB Created: 2020-03-06 16:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 286ba22ec59a6fe3c32b7215c0360e5d SHA-1: 5be6ecb70f94c5491410269a7f2808719b032763 SHA-256: 45c328fcf9db0a5e41ed644b99349d5afb6fc1a7f2ea5b48e1aa8e6131aa6aa6
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve as a link farm for SEO manipulation or to direct users to malicious websites for phishing or malware distribution. No scripts were extracted from this sample.

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://x0524609xstreamtravel.xsideas.com/uploads/1/3/0/6/130620453/130620453.html#skf+radial+spherical+plain+bearing+catalog
    • http://www.brannanschlitzbbq.com/uploads/1/3/0/2/130288875/likivagozakosomu.pdf
    • http://yorubaclubofbelgium.com/uploads/1/3/0/7/130775126/69dfcdf29.pdf
    • http://myjmbrmt.com/uploads/1/3/0/2/130288909/xavamuwutipolasa.pdf
    • http://travelswithmymother.com/uploads/1/3/0/5/130550749/7849101.pdf
    • http://www.camillejgrant.com/uploads/1/3/0/6/130639975/9118893.pdf
    • http://treatyrockfilm.com/uploads/1/3/0/2/130271121/xiketidox_jimiradoxo_jabewapes.pdf
    • http://www.griddz.com/uploads/1/3/0/9/130969183/burenuzorosejozuje.pdf
    • http://mail.jayvinchi.com/uploads/1/3/0/7/130740625/4392971.pdf
    • http://missheatherlee.com/uploads/1/3/0/2/130270863/a11f5b7ebe.pdf
    • http://ebookmybook.com/uploads/1/3/0/6/130639233/9834bdd4042.pdf
    • http://bbtreeservice.net/uploads/1/3/0/5/130589125/2112698.pdf
    • http://nolanlampson.com/uploads/1/3/0/6/130640021/4627375.pdf
    • http://meet-your-self.com/uploads/1/3/0/6/130621197/2968711.pdf
    • http://northhobby.us/uploads/1/3/0/6/130604834/3477956.pdf
    • http://palmettocreditsolutions.com/uploads/1/3/0/5/130544067/xekamiwosodov-bilipenewateve-somirefazolepob.pdf
    • http://binaripi.com/uploads/1/3/0/6/130604229/ce6f16c.pdf
    • http://swissliftconsulting.ch/uploads/1/3/0/8/130874285/vumuxutofofakegufaz.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_off000057bb.bin
9e5ac18118d27b5eae95995e4dcb5d2a1d95f31e84262ca671763da6df168c01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57BB 6292 bytes

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