Malicious PDF — malware analysis report

Static analysis result for SHA-256 029a4b4b53e17025…

MALICIOUS

PDF

73.6 KB Created: 2020-03-29 08:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 62dce960d048e07338d4942e89bd3f3e SHA-1: 1f71411acf50048159cfe2522d8710ad99dd1ae0 SHA-256: 029a4b4b53e17025baabfd459f17134aa8487a59ba7bfe4907de07a300024f3e
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 similar domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to host malicious content or distribute malware. The ML classifier also flagged this PDF as malicious with high confidence.

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://nicolitulk.com.au/uploads/1/3/0/7/130775619/130775619.html#sen+cateto+opuesto+sobre+hipotenusa
    • http://otbexpos.com/uploads/1/3/0/7/130738526/mejakote.pdf
    • http://palosic.org/uploads/1/3/0/5/130546717/f19f9.pdf
    • http://coachvirtue.com/uploads/1/3/1/3/131380828/8a1afaf9bc208.pdf
    • http://5foot1ninja.com/uploads/1/3/0/5/130588656/64f2bfae1b5.pdf
    • http://sararyanduffy.com/uploads/1/3/0/8/130874286/c916d14a6.pdf
    • http://kmfcatering.com/uploads/1/3/0/8/130813601/depidowiriwotebedig.pdf
    • http://ns2.clarkschool.net/uploads/1/3/0/6/130604836/9156b08bf.pdf
    • http://dsiciplesbayou.com/uploads/1/3/0/5/130588824/b60bc94bbd.pdf
    • http://letterwithmia.com/uploads/1/3/0/6/130621059/fikeza-jesofi-gedosebobog.pdf
    • http://safeandcaresecurity.com/uploads/1/3/0/7/130775261/6322100.pdf
    • http://www.chitchatchan.com/uploads/1/3/0/5/130551907/folaf-ziwokoje.pdf
    • http://sasbizsolutions.com/uploads/1/3/0/6/130604165/relevosukubok_dozafuvu_memuxasetude.pdf
    • http://ion-industries.net/uploads/1/3/1/0/131070920/7955766.pdf
    • http://attorneychrisslaughter.com/uploads/1/3/0/5/130539344/9610085.pdf
    • http://www.goodkiddesign.com/uploads/1/3/0/4/130436288/e8b9f56ad4deb9.pdf
    • http://peak-performance-multisport.com/uploads/1/3/1/3/131379410/6a7c52cb7.pdf
    • http://www.lespirant.de/uploads/1/3/0/6/130605452/cdbfd.pdf
    • http://www.nicolleespinal.com/uploads/1/3/0/7/130776349/madulo.pdf
    • http://www.upfront-consulting.net/uploads/1/3/0/6/130639298/2774775.pdf
    • http://www.campingwithjoe.com/uploads/1/3/0/5/130539726/990918.pdf
    • http://alzheimerswalkcapecod.org/uploads/1/3/0/7/130775682/9124684.pdf
    • http://a1193485xstreamtravel.xsideas.com/uploads/1/3/0/5/130551135/12b2960679e.pdf
    • http://printsandframe.com/uploads/1/3/0/7/130739564/1809413.pdf
    • http://plumbersupplies.net/uploads/1/3/0/6/130621082/2f2a7c6b.pdf
    • http://directordean.org/uploads/1/3/0/3/130323506/082f5c9592.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://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfb4.bin
ebe24156f132a0e2c4e88845ceb3428fbf715478dbd3530dc8f6d373af111759		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB4 11488 bytes
font_01_sfnt_off0000e5ee.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 4144 bytes
font_02_sfnt_off0000f2e7.bin
af8126a5b0d41ecb1515c47968ec8c023091f7482057c014126e9ffe5deb5db5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 3804 bytes
font_03_sfnt_off0001002f.bin
e8397047731bfd4629467185c5d3107524dee4d99a7520945325aeb852477b6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 16064 bytes

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