Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10f13260b4c2b20…

MALICIOUS

PDF

37.5 KB Created: 2020-04-01 20:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d6fb165a110031f1f35a3b43e5c86e7f SHA-1: 5007110edc2e1690d8e750f2e8234a3cd0eaeb1a SHA-256: b10f13260b4c2b203b712388cd86ecf6546d8fa0da14324d64c976c32d648025
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to other PDFs hosted on various domains, indicative of a link farm or SEO poisoning attack. The ML classifier strongly flagged this PDF as malicious. The document body itself contains what appears to be metadata and a URL, further supporting the lure to external content.

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://thesoonernetwork.com/uploads/1/3/0/5/130551174/130551174.html#marshall+valvestate+2000+avt+50
    • http://twinhorsefarm.com/uploads/1/3/0/6/130639027/750aeb71453b8.pdf
    • http://stanihome.ch/uploads/1/3/0/6/130605440/puzedowevapavosup.pdf
    • http://miracleinabucket.com/uploads/1/3/1/4/131453255/gufekugoruzalawife.pdf
    • http://thefreedomcodemasterclass.com/uploads/1/3/0/9/130969920/5928006.pdf
    • http://sophiaisabeldowd.com/uploads/1/3/0/5/130589450/8010935.pdf
    • http://pwfpllc.com/uploads/1/3/0/7/130775276/b480b05bcc.pdf
    • http://mxmsupport.com/uploads/1/3/0/4/130435518/piborifevuramomilu.pdf
    • http://giftgamegimmick.club/uploads/1/3/0/6/130621973/pisubujuxovonelel.pdf
    • http://mail.tcbeatsdj.com/uploads/1/3/0/7/130739654/xavuvotuje_demomujawifeve_bumesaf_jetimufa.pdf
    • http://stlukeeureka.com/uploads/1/3/0/8/130813553/9136006.pdf
    • http://wildwomanofbegonia.com/uploads/1/3/0/4/130483953/weraxewavazovir.pdf
    • http://lifeconstrucoes.com/uploads/1/3/0/5/130589131/6714523.pdf
    • http://retiredandliving.com/uploads/1/3/1/3/131398576/862249.pdf
    • http://nvui.org/uploads/1/3/0/7/130775294/lamos-tigariwetaj.pdf
    • http://psychicfrontier.com/uploads/1/3/0/4/130490451/zutoditemer.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_off00006925.bin
68be015b9e2e691af0de77b81b23d4deb5982a62db939553794a8c94beeb6c8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6925 8220 bytes

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