Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c286c41d2b1cb6d…

MALICIOUS

PDF

41.2 KB Created: 2020-06-11 21:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d4126b4b05bf0ad7c615608f5a23e42 SHA-1: d02dc9a963ddb23c0d02daf56c86318a85967f99 SHA-256: 7c286c41d2b1cb6d9c5722d4ec4b58a232e13397e535c1c645065a4982e59ab5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to other PDF files hosted across numerous domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text appears to be obfuscated or corrupted, but the presence of numerous external links suggests a malicious intent, possibly for SEO spam or to distribute further malicious 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://savinasheartministry.org/uploads/1/3/1/3/131384018/131384018.html#marimba+ani+yurugu+pdf
    • http://mexisprinkles.com/uploads/1/3/1/4/131438278/fenaxubatated.pdf
    • http://k9designwarroad.com/uploads/1/3/1/3/131380320/ef8aaa708011.pdf
    • http://tropicalconservationfund.org/uploads/1/3/0/8/130874077/b2a352c3e3ad35.pdf
    • http://bunrunners.net/uploads/1/3/1/6/131606955/09718385.pdf
    • http://fencecompanyfortworth.com/uploads/1/3/1/4/131482937/sopidebivusumab.pdf
    • http://hello-gorgeous-lashes.com/uploads/1/3/0/5/130590700/gaguxa-gorazawonibel-sudarid-doxijupawaze.pdf
    • http://paintingholidays-france.com/uploads/1/3/0/8/130874246/8115977.pdf
    • http://sarahfuchs.org/uploads/1/3/1/8/131856987/1689814.pdf
    • http://perlabakingco.net/uploads/1/3/1/3/131380273/7b7f083.pdf
    • http://thesoonernetwork.com/uploads/1/3/0/5/130551839/fuwilaguga.pdf
    • http://graysystemsinc.com/uploads/1/3/0/4/130489841/6553955.pdf
    • http://scottnewmedia.com/uploads/1/3/1/3/131380343/9915895.pdf
    • http://battledore.ca/uploads/1/3/0/6/130640191/zebazu-zapakuj-doxavipeti.pdf
    • http://kittyshomeaway.com/uploads/1/3/0/8/130874339/perimelinor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://zowolov.files.wordpress.com/2020/06/24510370024.pdf
    • https://piwutozegik.files.wordpress.com/2020/06/dekef.pdf
    • https://fafepewadala.files.wordpress.com/2020/06/12947257869.pdf
    • https://kawumafovod.files.wordpress.com/2020/06/57447424939.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fa4.bin
3c08631839ff8816f22456a571e63a3d82824f9619d2c18ef29b11e65f52dfc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 12976 bytes