Malicious PDF — malware analysis report

Static analysis result for SHA-256 073e94080a234f10…

MALICIOUS

PDF

77.3 KB Created: 2020-06-06 02:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0393a93abb726cd178ddf61e3dabaff SHA-1: 03c3f9e393d37f8676875ad98efeb3f67c277898 SHA-256: 073e94080a234f10777401d689ad4c30f23448af2ba08f08dbbab35d32b2c19c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the presence of numerous external links suggests a potential for further malicious activity.

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://snap.town/uploads/1/3/0/2/130272905/130272905.html#kre-o+transformers+ratchet+instructi
    • http://hostmaster.soundtrackmusic.co.uk/uploads/1/3/0/5/130546036/sekiwovewabetef.pdf
    • http://10dayscreditboost.com/uploads/1/3/0/5/130546209/lorerozivemure-xinoperubimat-fefozeda-valadaj.pdf
    • http://moriahtelecoms.net/uploads/1/3/1/3/131381782/tenojalofanirol-xoliguluki-padalubonade.pdf
    • http://ivery.co/uploads/1/3/1/4/131437350/635464.pdf
    • http://jprecoveryhousing.com/uploads/1/3/1/6/131637517/72d145651d4a.pdf
    • http://snap.town/uploads/1/3/0/2/130272905/terms.html
    • http://snap.town/uploads/1/3/0/2/130272905/dmca.html
    • http://snap.town/uploads/1/3/0/2/130272905/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vovalex.files.wordpress.com/2020/06/51750276801.pdf
    • https://majuxuw.files.wordpress.com/2020/06/mowivosegurugixadura.pdf
    • https://fajalukopuz.files.wordpress.com/2020/06/fanugafovapabawinosajulo.pdf
    • https://zojibulo.files.wordpress.com/2020/06/5741133994.pdf
    • https://zedolilepo71314509.files.wordpress.com/2020/06/87540237224.pdf
    • https://kogubala.files.wordpress.com/2020/06/66956020301.pdf
    • https://wijitefurusu.files.wordpress.com/2020/06/juzowipedekojuxexonabir.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_off000105c1.bin
97bb184fffe76a7a2517deae2c097d8aa04368f74f172c67fa50995690bbb383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105C1 10380 bytes

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