Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1723b1b4e8cc0d…

MALICIOUS

PDF

34.5 KB Created: 2020-03-07 15:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 199e63a04c61f656e054a0ef3bf901ec SHA-1: 40d1c5a412a3bd1f9cf6034c737d3391730bd0bb SHA-256: 4f1723b1b4e8cc0da9676a2c822866e6142f8d42177b767d3452e794ffc6b94d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains references to URLs and potentially search engine optimization (SEO) related text, reinforcing the link farm detection. The primary attack pattern appears to be directing users to a large collection of external resources, likely for malicious purposes such as SEO spam or distributing further malware.

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://1890joyridgeroad.com/uploads/1/3/0/5/130550973/130550973.html#cutex+regular+nail+polish+remover+msds
    • http://replaceyourwoman.com/uploads/1/3/0/6/130604255/jidefularefivowaj.pdf
    • http://behindthecurtainofbylaw.net/uploads/1/3/0/8/130814475/c4b91743749.pdf
    • http://www.outofmywritemind.net/uploads/1/3/0/6/130621757/bivezuxufile.pdf
    • http://www.cincyfastpitch.com/uploads/1/3/0/5/130539215/wisagebug.pdf
    • http://leasemyrv.com/uploads/1/3/0/7/130739267/nasupepobiwesiwesan.pdf
    • http://www.cte-vaporsllc.com/uploads/1/3/0/7/130739661/9817754.pdf
    • http://redcarpetfestival.live/uploads/1/3/0/6/130604729/fetexonosif.pdf
    • http://michalrutkowski.net/uploads/1/3/0/5/130551904/vemujewabebato-taduv-sigowajafujew-roxeru.pdf
    • http://studyinfo.ch/uploads/1/3/0/4/130475989/ribupa.pdf
    • http://galadus.pl/uploads/1/3/0/6/130620991/2674e79fac6.pdf
    • http://coastlinecarpets.com/uploads/1/3/0/3/130379065/ludokoba_makuzajogedi_pawijewotoreba.pdf
    • http://eumid.com/uploads/1/3/0/2/130271209/lorujomirajas.pdf
    • http://garducci.com/uploads/1/3/0/5/130588922/6670927.pdf
    • http://theothercarshow.com/uploads/1/3/0/4/130490245/1d2884b77e.pdf
    • http://off-therange.com/uploads/1/3/0/2/130272081/kulamutimetotas-zenenaged-dakare.pdf
    • http://gamingwithpulse.com/uploads/1/3/0/5/130590608/pebajari.pdf
    • http://oklahomaraw.com/uploads/1/3/0/8/130813649/43090b5a925.pdf
    • http://bbepro.com/uploads/1/3/0/8/130813054/rivifis_wanol_warela.pdf
    • http://www.shop.cafecotillion.com/uploads/1/3/0/6/130604354/d9e421f52.pdf
    • http://hushintimateapparel.shop/uploads/1/3/0/4/130476821/e397e54bad2b8a7.pdf
    • http://globalhappytrain.com/uploads/1/3/0/5/130589042/gesezaxopokot-fijosu.pdf
    • http://www.amazingcarpetcleaningkc.com/uploads/1/3/0/4/130435577/vewiwusaxafabigof.pdf
    • http://naughtybitssoftware.com/uploads/1/3/0/2/130273748/1668018.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_off00006146.bin
1106f6dcb3aad6b01800693a70af15f341b83c21525c735de96c53011d05ce02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 6768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.