Malicious PDF — malware analysis report

Static analysis result for SHA-256 619057bab583de5a…

MALICIOUS

PDF

42.4 KB Created: 2020-04-03 04:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 658b4138811345c4c80c64e74c08ff87 SHA-1: c7eca42236b78c113ad7f6214b35694b03ccccb4 SHA-256: 619057bab583de5aaa8ac4a94025892531dbfc9a31668cd2a36e8e3a318bd881
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm or redirection to malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to direct the user to potentially harmful websites, possibly for SEO manipulation or to host further malicious payloads.

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://mountainupcaps.com/uploads/1/3/0/4/130476736/130476736.html#re+stacks+bon+iver+ukulele+chords
    • http://bayareadogdaycare.com/uploads/1/3/1/4/131413418/kifopelufuv.pdf
    • http://grantfit.net/uploads/1/3/0/8/130813539/pebijizalu.pdf
    • http://notepadbuddy.com/uploads/1/3/1/3/131383931/5914668.pdf
    • http://doubleshutterphoto.com/uploads/1/3/0/7/130776133/6b2ed57f1f0.pdf
    • http://naturespurelove.com/uploads/1/3/0/5/130546497/7816072.pdf
    • http://aublomobile.com/uploads/1/3/0/4/130476078/zexizilimepun.pdf
    • http://creation-code.com/uploads/1/3/0/2/130274378/taleri-memajemusufe.pdf
    • http://jasonwdowd.com/uploads/1/3/1/1/131164012/fesape.pdf
    • http://sabankazim.com/uploads/1/3/1/4/131453618/a7ba19ff165.pdf
    • http://sordonline.com/uploads/1/3/0/7/130775087/rukidipumilivogop.pdf
    • http://effekt2020.com/uploads/1/3/1/3/131383624/fadezasevom-tixejo.pdf
    • http://gracethieme.com/uploads/1/3/0/7/130776312/4043237.pdf
    • http://triosdigital.com/uploads/1/3/0/6/130603779/gisamujifiv_jinuwidozave_nuduxametikemi.pdf
    • http://mirrormath.net/uploads/1/3/0/7/130776888/lebefej_negofipipuvexit_zilaki_mekizadabetamug.pdf
    • http://bytheinchitsacinch.com/uploads/1/3/0/4/130488316/976110fa.pdf
    • http://lunaspropaintingllc.com/uploads/1/3/0/6/130639860/7975930.pdf
    • http://smartkidsearlylearningacademy.com/uploads/1/3/0/6/130639270/nepuz.pdf
    • http://limitlessdrive.net/uploads/1/3/0/7/130739049/verivakug_xesujufewov_panidojisojuwoj.pdf
    • http://simplicityaccountingllc.com/uploads/1/3/0/9/130969264/5717958.pdf
    • http://allpurposeelectricllc.net/uploads/1/3/0/5/130588839/7642991.pdf
    • http://mykayscreations.com/uploads/1/3/0/6/130639741/a73079df7214.pdf
    • http://10210.org/uploads/1/3/0/5/130589014/6344310.pdf
    • http://cobblestoneconfectionsbakery.net/uploads/1/3/0/6/130605173/8117146.pdf
    • http://boozybakerygames.com/uploads/1/3/0/7/130739223/rakewiserijikaga.pdf
    • http://powercrafttools.com/uploads/1/3/0/7/130738524/devete-nifurepidiriva.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745d.bin
42360feeedf32f7b63d5177f557b4acc048499dd9cf12cddd8762f7649f38540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 7484 bytes
font_01_sfnt_off000091dc.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 2652 bytes

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