Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2864656ecbe59e…

MALICIOUS

PDF

41.4 KB Created: 2020-07-01 03:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad2e4cfaf69a41c5be24f27f232e031d SHA-1: 1d56ca3182f560eac6be3671e21e796bc2319148 SHA-256: ea2864656ecbe59e309fe5e7a7229c180f5cab2c2b94ffae5363a109d081ae19
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though partially corrupted, contains text related to 'M etier biblioth ecaire formation' and includes several URLs. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://files.pleasingfood.com/uploads/1/3/0/6/130639251/130639251.html#m%25C3%25A9tier+biblioth%25C3%25A9caire+formation
    • http://uwsc.net/uploads/1/3/1/4/131406650/sikawixumi-mejuf.pdf
    • http://files.amberward.org/uploads/1/3/1/3/131384418/babivalefafujim-lukokadepad-rubomev-gitigudet.pdf
    • http://visitsxm.org/uploads/1/3/0/6/130639254/3383814.pdf
    • http://autodiscover.northernlightllc.com/uploads/1/3/1/4/131410747/wewalin.pdf
    • http://northernlogic.co.uk/uploads/1/3/1/8/131856279/risudipuw.pdf
    • http://bnbcappuccino.com/uploads/1/3/0/5/130550732/sipux.pdf
    • http://dixonassociatesllc.com/uploads/1/3/1/8/131856903/2436169.pdf
    • http://thebigbearexperience.com/uploads/1/3/1/3/131384606/236e6840c354.pdf
    • http://lacontagroup.com/uploads/1/3/1/4/131454027/poxelifiwesumalod.pdf
    • http://host101.carmichaelnl.com/uploads/1/3/1/4/131408008/3f1aa58ea8.pdf
    • http://files.antoniatsaknaki.com/uploads/1/3/1/3/131380383/3536937.pdf
    • https://fowolabu.files.word
    • https://fogojifoxuni.files.wordpress.com/2020/06/37021837752.pdf
    • https://jovemubam.files.wordpress.com/2020/06/jifopasuxurikovizasiwu.pdf
    • https://fowolabu.files.wordpress.com/2020/06/14749112599.pdf
    • https://datunexa.files.wordpress.com/2020/06/moxifulewesidem.pdf
    • https://pofiwofuleb.files.wordpress.com/2020/07/bineroletemalinisulegan.pdf
    • https://xalofupoz.files.wordpress.com/2020/06/vuwumesidukipapasugun.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617b.bin
ceb3dfcc3216a3a64ee2dacb68ea49901c6b210b2eea12bf65812ac10e8ffd18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 5016 bytes
font_01_sfnt_off00007212.bin
0c720f4297f21740ef8f9667948c400bcf51bc7e124af19d34abe08099b41157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 11640 bytes

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