Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a1fd09a7c7e0ed…

MALICIOUS

PDF

38.7 KB Created: 2020-06-07 15:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1886f7a98927b45622700327025889ee SHA-1: cb292a4bf346e6678e587ddae6d30010eb327494 SHA-256: 12a1fd09a7c7e0ed743d5fea8b8d3ec078eaaf6203fdb8e40a2d8078b9d60375
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified as a 'PDF SEO LINK FARM' heuristic. The embedded URLs point to various domains, suggesting a coordinated effort to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link farm.

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://crestviewpaws.club/uploads/1/3/0/7/130776724/130776724.html#bananer+Br%25C3%25B8dbudding+opskrift
    • http://webdisk.murphonanadventure.com/uploads/1/3/0/8/130874162/b26a34f442916e.pdf
    • http://cpcontacts.escorias.com.ar/uploads/1/3/0/5/130589064/kupumuvojudubutebib.pdf
    • http://debruleclinic.com/uploads/1/3/0/5/130544384/2963a478.pdf
    • http://sweetandsassyfashions.com/uploads/1/3/1/4/131453259/391418.pdf
    • http://algaebookandpaper.com/uploads/1/3/1/4/131406982/e1796610ccc.pdf
    • http://cantcontourme.com/uploads/1/3/1/4/131455463/luzoxaxubelotus_ratilufojikotu_votivubutu_fewifakipogemij.pdf
    • http://purnaturals.net/uploads/1/3/0/7/130775288/78ad4.pdf
    • http://theameshoe.com/uploads/1/3/0/3/130379078/5969851.pdf
    • http://handsandheartshealingarts.com/uploads/1/3/0/9/130969508/kapasumenone-gutokutimudawef-tabuwubugetife-nupuzepope.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pamivibafime.files.wordpress.com/2020/06/29972970955.pdf
    • https://dibogunudito.files.wordpress.com/2020/06/28402869923.pdf
    • https://majemim.files.wordpress.com/2020/06/toveralumutemezo.pdf
    • https://valikeziz.files.wordpress.com/2020/06/sememexibemoxulodu.pdf
    • https://sogifefuve684083845.files.wordpress.com/2020/06/watavipenidixaxegusim.pdf
    • https://vevumoruv.files.wordpress.com/2020/06/zevazez.pdf
    • https://nosajeba.files.wordpress.com/2020/06/70113751757.pdf
    • https://visazuk.files.wordpress.com/2020/06/morisisib.pdf
    • https://nudokux.files.wordpress.com/2020/06/tozuwalowekepovanofupoveg.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006867.bin
2399d7ded2e8c9e7bb396bd96860cdc47bdf80cc7aef8cc2a9645354320656f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 10828 bytes