Malicious PDF — malware analysis report

Static analysis result for SHA-256 196c026382e79ec7…

MALICIOUS

PDF

52.7 KB Created: 2020-04-02 13:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 540a00766bbf3708e9f19ee06ea1d48a SHA-1: 472be06274470447fc5ca225ceb8e736ace5cf90 SHA-256: 196c026382e79ec767564529806fca9525b8cb8152727d7e7106d50180d14e20
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as lures or redirects to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://slbconsultingservices.com/uploads/1/3/0/8/130813117/130813117.html#hansel+
    • http://perfectlycomplicated.com/uploads/1/3/0/9/130969707/4413915.pdf
    • http://rachkonline.com/uploads/1/3/0/8/130814416/zazes_mewefoparaxisew_guduzaxasawaluj_vujapokudezogu.pdf
    • http://donnbryant.com/uploads/1/3/0/2/130292098/joriluvo-notifetam.pdf
    • http://calicorealestate.net/uploads/1/3/0/3/130313155/2464019.pdf
    • http://internationalchurchsantcugat.org/uploads/1/3/0/5/130546574/3416825.pdf
    • http://evolutionmaritime.com/uploads/1/3/0/6/130620972/fuduxoserubowifebum.pdf
    • http://cuddyhut.net/uploads/1/3/0/6/130604785/4eaa962a.pdf
    • http://hanscerealcafe.com/uploads/1/3/0/8/130873840/15de72acaa.pdf
    • http://danilopuccetti.com/uploads/1/3/1/3/131381658/4f085e14ea.pdf
    • http://keepoaklandqueer.com/uploads/1/3/1/3/131380609/runenutede-zanobapipenen.pdf
    • http://globalecolimpeza.com/uploads/1/3/0/4/130435690/fesowilesuwusibo.pdf
    • http://rhjerkyoutlet.com/uploads/1/3/0/6/130620275/3226086.pdf
    • http://interpretingconsultants.com/uploads/1/3/0/4/130476351/566235.pdf
    • http://sgearinc.com/uploads/1/3/0/6/130622029/mivukadolu.pdf
    • http://polskagrocery.com/uploads/1/3/0/9/130969663/4591d13039471.pdf
    • http://savageevolution.com/uploads/1/3/0/3/130324419/b62ea.pdf
    • http://yourbcrealtor.com/uploads/1/3/0/6/130621854/fesomali.pdf
    • http://yawslegin.com/uploads/1/3/0/6/130620803/3993698.pdf
    • http://mollyharperactress.com/uploads/1/3/0/3/130313284/xeremakejifowaf.pdf
    • http://prosperdoc.com/uploads/1/3/1/0/131069832/nepadulubawixepafede.pdf
    • http://forgenesis.ca/uploads/1/3/0/4/130477026/41949.pdf
    • http://thebestofbigsky.com/uploads/1/3/0/6/130604635/4d834133b9e.pdf
    • http://psitau.com/uploads/1/3/0/5/130546538/fuzokuxako_pewazaden_jowonukigiferu.pdf
    • http://modernistabeijing.com/uploads/1/3/0/9/130969191/melipazixupaf.pdf
    • http://uppercutpainting.ca/uploads/1/3/0/6/130639956/2558342.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000820d.bin
581429d0b5ff74f4e897aa027c8024037cd0642aa7086a4c01ccbc86f986fdcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x820D 9104 bytes
font_01_sfnt_off0000a441.bin
63f5e27ee3d24cc00d413e59c301cc73ab377383609796993547673f2bea898c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA441 2600 bytes
font_02_sfnt_off0000ad6d.bin
08216b38242dcdb62c00957ec0e1f820ea40bbc9f6c0c1312c265d81ec4fafff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6D 16192 bytes

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