Malicious PDF — malware analysis report

Static analysis result for SHA-256 72357d02766dd8e4…

MALICIOUS

PDF

72.9 KB Created: 2020-03-28 08:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: a9d4ef3114564da532a9d44f7aaae871 SHA-1: 5b32209afc8fcf682d07737d56c3f832d5689ff6 SHA-256: 72357d02766dd8e43478b0f1146deb47e525c00b7325d646e4a050cfb2f64c0a
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a link farm with 30 external PDF links, suggesting a spam or SEO manipulation tactic. The document body, though heavily obfuscated, contains URLs that are also listed in the extracted URLs section. The presence of numerous external links points towards an attempt to redirect users to potentially malicious or deceptive content hosted on various domains. No scripts were extracted from this sample.

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://dubaidesignsprint.com/uploads/1/3/1/4/131438397/131438397.html#restade+fracciones+con+enteros PDF link annotation
    • http://brightneurons.com/uploads/1/3/0/5/130588861/janumexu_jivuferesivona_jamurarisodimen.pdfIn PDF document text
    • http://secauto.org/uploads/1/3/0/5/130589080/3d650b58ce7c.pdfIn PDF document text
    • http://sanfrancisco-interactivehypnotherapy.com/uploads/1/3/0/5/130588693/1222520.pdfIn PDF document text
    • http://foundermachine.org/uploads/1/3/0/4/130476974/a7aeed35defcd5.pdfIn PDF document text
    • http://queenofthewaves.net/uploads/1/3/0/5/130588574/7d9e47e58bf4.pdfIn PDF document text
    • http://neoho.net/uploads/1/3/0/2/130271080/gidumugavaxawome.pdfIn PDF document text
    • http://tigerlilyyoga.com/uploads/1/3/0/8/130873908/mimukavidugena-wavam.pdfIn PDF document text
    • http://hostmaster.veritasecology.com/uploads/1/3/0/6/130640107/9758137.pdfIn PDF document text
    • http://aneeqarana.com/uploads/1/3/0/6/130621634/1467910.pdfIn PDF document text
    • http://ecosanexcleaning.com/uploads/1/3/0/2/130289002/a5ebe4c66cf.pdfIn PDF document text
    • http://www.klinedogs.com/uploads/1/3/0/6/130604269/vabuwamixakixi-dogonukewa-kenowonepuvete.pdfIn PDF document text
    • http://agingathometech.com/uploads/1/3/0/5/130588796/6216561.pdfIn PDF document text
    • http://spokanebasslessons.com/uploads/1/3/0/9/130969795/4551135.pdfIn PDF document text
    • http://rvtrailertires.net/uploads/1/3/0/4/130488073/6975650.pdfIn PDF document text
    • http://miriamsterzelblog.com/uploads/1/3/0/5/130541803/vemonopeso.pdfIn PDF document text
    • http://lbichef.com/uploads/1/3/0/6/130621036/fikonuwivo.pdfIn PDF document text
    • http://mse2opiodepidemic.com/uploads/1/3/0/6/130621451/tutudim-gusekegusoged-balagakixukuvof.pdfIn PDF document text
    • http://asliceofwisdom.com/uploads/1/3/0/7/130739802/7182791.pdfIn PDF document text
    • http://www.carolalvarez.com/uploads/1/3/0/5/130588564/fapewerov.pdfIn PDF document text
    • http://heybereaufuels.com/uploads/1/3/0/3/130313410/zisoborewotawavipaz.pdfIn PDF document text
    • http://epoxynoco.com/uploads/1/3/0/6/130639765/2c31cfb2d0a8f3.pdfIn PDF document text
    • http://datalyx.co/uploads/1/3/0/7/130775554/48f28f1e.pdfIn PDF document text
    • http://server65098.misscarols.com/uploads/1/3/0/5/130590139/f87f8bf81e23d.pdfIn PDF document text
    • http://pastillacytotecenelsalvador.com/uploads/1/3/0/6/130639199/dusapok.pdfIn PDF document text
    • http://rzlifecoach.com/uploads/1/3/0/7/130776734/71b5d.pdfIn PDF document text
    • http://linux.thai.net/projects/fonts-tlwgIn PDF document text
    • http://www.thaitux.infoIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 12488 bytes
SHA-256: 4d56fc43627fb6e4fa7ae6d2ef446da92d53e07487a29ba5eba79dd39df1ed76
font_01_sfnt_off00009540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9540 12556 bytes
SHA-256: 0e831f486b9a7287917987d24b3e5c020307e965a9401c009bd6a53b9824cfde
font_02_sfnt_off0000bd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD15 10212 bytes
SHA-256: bf9716f728c772ab866891e478d68dd14306e9b778694b522697624a369e23e1
font_03_sfnt_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 19376 bytes
SHA-256: f806e912a1537d1a386184034b4afb081b9c995632b6fbc3d9d1e17d022b1112
font_04_sfnt_off0000fe54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE54 8224 bytes
SHA-256: 67b6779f82af44e8ecada882a2064b0ca631765dba5109f74c2f6d5370f2c62f

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