Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ab3d594b7350e6…

MALICIOUS

PDF

37.5 KB Created: 2020-03-30 06:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 312411bbfefc5f66e74ec04628dda561 SHA-1: 1cc97cd5d5f3bab3630207377594c60dc13cfe87 SHA-256: 61ab3d594b7350e6edc191f06e6ace73a217fdbcbaa4ad52ba5717b1902d8bca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness. The embedded URLs are the primary IOCs, pointing to various domains that likely host further stages or 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://74-123-73-78.mgwnet.com/uploads/1/3/1/0/131070982/131070982.html#geo+metro+engine+swap
    • http://perfectproductions.no/uploads/1/3/1/0/131070859/83b9525.pdf
    • http://concordfbc.org/uploads/1/3/0/4/130477719/6992889.pdf
    • http://easymortgagedeals.com/uploads/1/3/0/7/130739169/1738936.pdf
    • http://thebelieversoutlet.com/uploads/1/3/1/4/131408204/faxofov-fejixinavibu-redet.pdf
    • http://36exp.org/uploads/1/3/0/3/130313427/jilidegikoson.pdf
    • http://heavygratitude.com/uploads/1/3/0/2/130287246/megijodoku.pdf
    • http://thecountryeggarizona.com/uploads/1/3/0/7/130739532/9062338.pdf
    • http://bikescc.org/uploads/1/3/0/6/130604537/baketukunel.pdf
    • http://backstage.one/uploads/1/3/0/9/130969500/terupam_zanonige_xatoxiwol_tepuvupozelez.pdf
    • http://nellytotssoftplay.com/uploads/1/3/0/6/130639085/905286fe79746.pdf
    • http://rosendoprado.com/uploads/1/3/0/5/130551765/baselolesowagunezuva.pdf
    • http://handymanthecape.com/uploads/1/3/1/1/131164399/5967583.pdf
    • http://pointdelivered.com/uploads/1/3/0/6/130621831/widigisotov.pdf
    • http://spaaah.org/uploads/1/3/1/1/131164308/7008025.pdf
    • http://threepointclub.info/uploads/1/3/0/4/130435598/dumebazewaj_makax.pdf
    • http://maryloder.com/uploads/1/3/0/5/130541656/tififazupufexibibaki.pdf
    • http://blackstorm.solutions/uploads/1/3/0/7/130775278/xafitudeli.pdf
    • http://cupidcardgame.com/uploads/1/3/1/1/131164402/17801f0de3073.pdf
    • http://sarahwalpole.com/uploads/1/3/0/5/130588902/runoje.pdf
    • http://emmak.co/uploads/1/3/0/4/130488213/gipadeserumopupi.pdf
    • http://shalanjoudry.com/uploads/1/3/1/0/131071231/893712330b49.pdf
    • http://simpsonclass2015-2016.com/uploads/1/3/0/2/130287839/4567888.pdf
    • http://massagecanhelp.com/uploads/1/3/0/7/130776852/be605cdcf.pdf
    • http://onnellisuuskoulu.net/uploads/1/3/0/2/130273624/0ac4d9d9.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_off0000677c.bin
4d8f12e6aed355ee85e894ddda3c9c748012a495adca7f6033e3e1539bfdd6c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 8144 bytes

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