Malicious PDF — malware analysis report

Static analysis result for SHA-256 622029b2537bc4bb…

MALICIOUS

PDF

50.1 KB Created: 2020-05-21 05:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a50670838ac05db9482474e419859618 SHA-1: 29cb57c60cc15001c33cfd7f3516765ebcc36692 SHA-256: 622029b2537bc4bb174d319c3c9ba7186b62d42038d04c298cbd284bcd69982d
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve to redirect users to malicious websites or to distribute further malware, potentially as part of an SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://foothillsbiblefellowship.com/uploads/1/3/1/0/131069766/131069766.html#origami+bulbasaur+instructions
    • http://krutimodekurty2017.com/uploads/1/3/0/2/130289417/ridatezogujigalude.pdf
    • http://gaddishomeservices.com/uploads/1/3/0/6/130604200/nuximurosavuzo.pdf
    • http://swflharmonychamber.org/uploads/1/3/0/6/130621063/6467581.pdf
    • http://leanrxfit.com/uploads/1/3/0/2/130270762/vovake_mafulibatorin_juluweki_vawobo.pdf
    • http://coastalaquaticsva.com/uploads/1/3/0/5/130547969/b8c906e73cb.pdf
    • http://elaineyuki.com/uploads/1/3/1/4/131437025/nutezoxavoj.pdf
    • http://crm-specialists.com/uploads/1/3/0/5/130544872/rotedukavokadi-tazetituwu.pdf
    • http://star9.ca/uploads/1/3/0/9/130969329/surevudujaxefigu.pdf
    • http://shoreautoac.com/uploads/1/3/1/4/131437982/felilij.pdf
    • http://workingwomanbrand.com/uploads/1/3/0/2/130272506/kozinadiw.pdf
    • http://plan4healthnymetro.org/uploads/1/3/0/7/130776405/4852427.pdf
    • http://wsdcdebate.com/uploads/1/3/1/0/131070196/xolozodolizokuruvuto.pdf
    • http://utahinvestorsgroup.com/uploads/1/3/0/7/130740264/misozazijalap.pdf
    • http://linda-bellydancer.com/uploads/1/3/0/5/130588712/sulitowepa.pdf
    • http://mortgage.school/uploads/1/3/0/6/130639068/varaj_lepima_wujofaxif_pebiwokelar.pdf
    • http://capmovistarjp.com/uploads/1/3/0/3/130379182/3608558.pdf
    • http://theblackboxonline.org/uploads/1/3/1/6/131636808/burukaxugaluzoz.pdf
    • http://howellandassociates.services/uploads/1/3/0/8/130873978/d1d10c.pdf
    • http://sojournsandserendipity.com/uploads/1/3/0/9/130969364/2521331.pdf
    • http://stemmfloral.com/uploads/1/3/0/3/130313198/9491988.pdf
    • http://violingigs.com/uploads/1/3/1/1/131163751/gekesoruxufurulodifu.pdf
    • http://sharonmasonfine.com/uploads/1/3/0/5/130551641/1643629.pdf
    • http://houzzphotog.com/uploads/1/3/1/4/131455543/e162a.pdf
    • http://obsidianlogisticstransportation.com/uploads/1/3/0/2/130272278/daa704ae4c.pdf
    • http://urgenticaretexas.com/uploads/1/3/0/4/130489275/domugu-tunexonavafenif-veguselixepa.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_off0000996c.bin
fcfa9b13b20eefde2fc47d26aa05833638f08bc322507844e525a111304571ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996C 10336 bytes

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