Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f387fa56b1020c7…

MALICIOUS

PDF

74.5 KB Created: 2020-04-01 12:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 16a4a7bd96f55ec8bed847543ff61815 SHA-1: da7e45e674cc5ddb7c22eeab42bc5b9c2687e712 SHA-256: 0f387fa56b1020c733caa6191d5ff4d5a7151b34c9f31f914fdaaf7e356a9232
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential link farm or SEO manipulation scheme. The document body, though heavily obfuscated, contains a URL that matches one of the extracted links. No scripts were extracted, but the presence of numerous external links suggests a redirection or hosting mechanism for 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://gracecartercapstone.com/uploads/1/3/1/3/131383823/131383823.html#analysing+political+shepsle
    • http://pilatesforeverybody.net/uploads/1/3/0/5/130540504/girosovinofif.pdf
    • http://christianhomeschoolersunited.com/uploads/1/3/0/4/130475980/fadolu.pdf
    • http://jodiemarlow.yoga/uploads/1/3/0/6/130604397/f065a.pdf
    • http://simplecatholicism.org/uploads/1/3/0/6/130604820/375174.pdf
    • http://dawnsandahl.com/uploads/1/3/0/7/130739119/mamafalal.pdf
    • http://heavygratitude.com/uploads/1/3/0/2/130272985/nofem_zigokaxeliwu_medobewip.pdf
    • http://newlifewatersolutions.com/uploads/1/3/0/7/130776755/963482.pdf
    • http://greyhousevintage.com/uploads/1/3/0/5/130590334/kulugalejutojis.pdf
    • http://lavishpaint.com/uploads/1/3/1/3/131384654/bodutepobodibaxod.pdf
    • http://pipelinemro.com/uploads/1/3/0/8/130873787/bixoxow.pdf
    • http://mijn-2e-huis.nl/uploads/1/3/0/5/130589097/dimad_davonodeduxa.pdf
    • http://ouicoffeehouse.com/uploads/1/3/0/5/130550882/51d4a7521.pdf
    • http://internationalschoolforreikistudies.com/uploads/1/3/0/8/130813518/2498773.pdf
    • http://lambl.net/uploads/1/3/0/5/130588328/324dddae.pdf
    • http://bedoyaproductionllc.com/uploads/1/3/1/3/131384414/e698376a724.pdf
    • http://meredithgreenburg.com/uploads/1/3/0/8/130813779/jubibowoxufogipubid.pdf
    • http://amandajmordecai.com/uploads/1/3/0/7/130776594/d3ff0e90837bc8.pdf
    • http://hiung.net/uploads/1/3/0/2/130288453/vuxivumaxoreruxut.pdf
    • http://nytenterprise.com/uploads/1/3/0/6/130604335/nujavu.pdf
    • http://lambertassociates.net/uploads/1/3/0/5/130552016/42222d1f24f5dd.pdf
    • http://outletcarts.com/uploads/1/3/0/4/130476104/a8c2f1f93ac774.pdf
    • http://lakotallc.com/uploads/1/3/0/2/130287521/sexaxafejivo_nufepidiwapaxe_dedamosaligejep.pdf
    • http://riddlefamilyranchgrassfedbeef.com/uploads/1/3/0/7/130775062/e07f22e.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bd.bin
a81b9b1fb76d7c6bb36580312960ffd08a14a2c62989e9519158c5144cb20724		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 9544 bytes
font_01_sfnt_off000105ec.bin
404f329fc1c0c92cfe6f0f812bb03a8903d0a5333de3b52f2c9429bf9883b9a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 16244 bytes

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