Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ef52d7206677ee…

MALICIOUS

PDF

33.3 KB Created: 2020-05-13 10:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 48c51ff05dc7bb6ae1e056ce61b8cc88 SHA-1: b94e20f07afc4df294fd2e2ccb7da8e4fef87164 SHA-256: 71ef52d7206677eee6405becaf24c664c765597b663abc44468031a7e30fe981
96 Risk Score

Malware Insights

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

The PDF document is designed as a lure, presenting itself as 'Bound to you piano sheet music free' to entice users to click on numerous embedded links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection mechanism. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the embedded links, likely leading to further compromise.

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://masonleigh.com/uploads/1/3/0/5/130589331/130589331.html#bound+to+you+piano+sheet+music+free
    • http://avantexpert.com/uploads/1/3/0/5/130550997/pisesalojoxodulasuw.pdf
    • http://luluvintage.net/uploads/1/3/0/6/130639887/liwolozakameg.pdf
    • http://animatorfun.com/uploads/1/3/0/6/130604801/ac76683e395e03c.pdf
    • http://brooklynmorrisonsoftball.com/uploads/1/3/0/4/130436080/984357f.pdf
    • http://siersconstruction.org/uploads/1/3/0/4/130475966/9298517.pdf
    • http://robinbladimir.org/uploads/1/3/0/5/130539054/gegujutobez.pdf
    • http://vicsdailycafe.com/uploads/1/3/0/7/130776619/zukat-nevulozelam.pdf
    • http://beskabean.com/uploads/1/3/1/1/131163976/benazovejejor-tefazu.pdf
    • http://groundbreakingconstruction.net/uploads/1/3/0/5/130543028/savedijimede.pdf
    • http://gerri.website/uploads/1/3/0/7/130776745/xuvitawalojape.pdf
    • http://capitalprotectionsevices.com/uploads/1/3/0/8/130873715/2130641.pdf
    • http://newlifecentrechurch.ca/uploads/1/3/0/5/130551551/tajatasapulibo_wosepakamab.pdf
    • http://jardindeville.net/uploads/1/3/0/6/130620791/jokomilagadeku_rumadatefutage_kikaxevena.pdf
    • http://dawsongmt.org/uploads/1/3/1/4/131437865/dowuwapevonanir-gilorexipikizi.pdf
    • http://vigil4internationalpeace.org/uploads/1/3/0/7/130776334/d9b3634f36.pdf
    • http://harrellsca.org/uploads/1/3/0/6/130603884/bedumikex.pdf
    • http://kaimedvetdental.org/uploads/1/3/0/6/130620758/gajaninotujowomuwoli.pdf
    • http://pasaportecitas.net/uploads/1/3/1/3/131384254/3441352.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005560.bin
cc2bae9c67400f93b2faa873c52404fe4d53f4c776101f4387882a621cee9ffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5560 10536 bytes

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