Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b37f51d6b84fcb…

MALICIOUS

PDF

47.2 KB Created: 2020-03-27 02:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5630d6e0b21ca08b26cbebaac433ae86 SHA-1: a84d6b01135d3a5d3c8e2b0915d2c4c5b058a5f8 SHA-256: 28b37f51d6b84fcb44759a68fba306fd370ae4e6ffec9c5a37dad268561540af
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary link points to 'http://mijooski.com/uploads/1/3/0/5/130539355/130539355.html#que+es+la+prueba+de+posesion', which appears to be part of a link farm designed to manipulate search engine results or redirect users to malicious content. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent of redirecting users to potentially harmful sites.

Heuristics 3

  • 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
  • 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://mijooski.com/uploads/1/3/0/5/130539355/130539355.html#que+es+la+prueba+de+posesion
    • http://www.lficd.com/uploads/1/3/0/5/130551749/nujava-zonevukomi.pdf
    • http://blooming-lotus-salon.com/uploads/1/3/0/6/130620142/pitoxujafedilok.pdf
    • http://designguard.us/uploads/1/3/0/7/130775825/495023.pdf
    • http://mail.dsiquebec.com/uploads/1/3/0/6/130603942/ruxelij.pdf
    • http://74-123-75-210.mgwnet.com/uploads/1/3/0/6/130604452/4330090.pdf
    • http://charioworld.com/uploads/1/3/1/1/131163898/9412534.pdf
    • http://zacharylieberman.com/uploads/1/3/0/7/130740164/fipepa.pdf
    • http://bullfrogimaging.com/uploads/1/3/0/3/130323962/boxudadawuxupop.pdf
    • http://xiaojunhuang.info/uploads/1/3/0/6/130639892/lovoti_wopivolabuzape_vodazapag_wevagibenil.pdf
    • http://autonomousdrones.org/uploads/1/3/0/5/130590215/7693917.pdf
    • http://expresswaytoyrskullpdx.com/uploads/1/3/0/7/130738714/704689.pdf
    • http://extentrics.com/uploads/1/3/0/6/130620561/383277.pdf
    • http://nwcbuildingservices.com/uploads/1/3/0/6/130604447/werore.pdf
    • http://coastalinspirationsbook.marissaoneil.com/uploads/1/3/0/9/130969243/7599410.pdf
    • http://brewyearsevemke.com/uploads/1/3/0/8/130874124/944d77e97c.pdf
    • http://sethuwariyar.website/uploads/1/3/0/4/130435577/lidoweb_dujotaniv.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_off00008e52.bin
22b1c4497aefc654929cf0811354424ae58e93a1ef868265c4eeac9ccc85666c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E52 8896 bytes

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