Malicious PDF — malware analysis report

Static analysis result for SHA-256 d573622c3e549238…

MALICIOUS

PDF

51.7 KB Created: 2020-04-01 12:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e5edfbac79242fe4272ad482bb0f835e SHA-1: 8deb63cf5779e4f0e3e5c8461f82342f249a419b SHA-256: d573622c3e5492388c17ceccd0ee7210a066a81eb7a2e82af57f2e4341b5e742
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is designed to appear as a search result for game cheats, but it contains a large number of embedded links to external PDF files. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is commonly used to generate traffic or distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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://xrayshades.org/uploads/1/3/1/4/131407088/131407088.html#pokemon+fire+red+mewtwo+cheat+code+android
    • http://misssupremepurityqueen.com/uploads/1/3/1/4/131438814/lipom.pdf
    • http://www.altenpflege-wuerdevoll.de/uploads/1/3/0/7/130776492/7e7bd8e184592.pdf
    • http://qiiqgroup.com/uploads/1/3/0/9/130969200/xunepasix.pdf
    • http://usaincmexico.com/uploads/1/3/0/4/130476183/fudagexiwegotok.pdf
    • http://morganstudio.us/uploads/1/3/0/5/130550834/gukorupomuv.pdf
    • http://bookthesport.com/uploads/1/3/0/5/130543771/zodakedukage.pdf
    • http://miscmgmt.com/uploads/1/3/0/3/130313649/sirufusofojowej.pdf
    • http://clintmorris4layton.us/uploads/1/3/0/6/130604538/jodipekaxutut_labafevuv.pdf
    • http://hmr.marketing/uploads/1/3/0/5/130545698/nufiwakival.pdf
    • http://stevedibble.com/uploads/1/3/0/4/130490665/taxutovavu.pdf
    • http://bayareawineries.com/uploads/1/3/0/6/130604543/6609131.pdf
    • http://zacharynudelman.com/uploads/1/3/0/3/130312929/tekudulojuwol-kugesagado-papejiwivevo.pdf
    • http://3800-3828hawthorn.com/uploads/1/3/0/7/130739839/xopuwerifitodok.pdf
    • http://jlkconstruction.org/uploads/1/3/0/3/130379397/vazegad.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009fc4.bin
2c5cdb625ed6dca127e3e74993d7c185731597fce59521a0d4b4cbf32e6cde8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC4 8876 bytes

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