Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e43225410a449d…

MALICIOUS

PDF

77.4 KB Created: 2021-05-31 12:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23dac64ece52f1b032dee9e9b5acfb2d SHA-1: ac5acab1527a0e4b9c3237cd1e153b892b50e171 SHA-256: d7e43225410a449da47dd21dc14bf730a9c35066629420a3cd5a41c062c5f5d2
96 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous external links, many pointing to PDF files hosted on various platforms. The primary malicious URL, 'https://mezovuduw.ru/strik?utm_term=fake+gps+joystick+apk+download+for+pokemon+go', suggests a lure for downloading a fake application. While no scripts were explicitly extracted, the PDF structure and the presence of many external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://mezovuduw.ru/strik?utm_term=fake+gps+joystick+apk+download+for+pokemon+go
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/xowomolumudov.pdf
    • https://sivowudu.weebly.com/uploads/1/3/7/5/137513174/jinajozuvotivat.pdf
    • https://static.s123-cdn-static.com/uploads/4487918/normal_6000fd93d0ff2.pdf
    • https://cdn-cms.f-static.net/uploads/4445737/normal_6021f1db845bb.pdf
    • https://temegefa.weebly.com/uploads/1/3/4/5/134583031/nuveziduf_jiwujejabu_jakajusunepuv.pdf
    • https://raketesi.weebly.com/uploads/1/3/4/6/134632322/wipovodozumep.pdf
    • https://suguzavajud.weebly.com/uploads/1/3/4/7/134744383/dijipegapemu-wapanokakide-zuvorafet-xederuxer.pdf
    • https://cdn-cms.f-static.net/uploads/4446937/normal_600c38dc3796c.pdf
    • https://cdn-cms.f-static.net/uploads/4468531/normal_601ad1af0aaf7.pdf
    • https://static.s123-cdn-static.com/uploads/4465145/normal_5ffde5c2e9a4c.pdf
    • https://cdn-cms.f-static.net/uploads/4376371/normal_6062918d16eb8.pdf
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/7eb5e294ade.pdf
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fd169a389f5f.pdf
    • https://jifujutikawe.weebly.com/uploads/1/3/5/3/135328504/2489089.pdf
    • https://vudunige.weebly.com/uploads/1/3/5/9/135981242/1d6f8b381.pdf
    • https://ruxosegid.weebly.com/uploads/1/3/4/2/134265817/1823914.pdf
    • https://cdn-cms.f-static.net/uploads/4414357/normal_602b7794c1dce.pdf
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/jevinizewakid.pdf
    • https://nuzibekupin.weebly.com/uploads/1/3/4/3/134338080/7988521.pdf
    • https://static.s123-cdn-static.com/uploads/4471252/normal_5ff2bd8c7658b.pdf
    • https://zigepixapi.weebly.com/uploads/1/3/5/3/135392100/8149372.pdf
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ff78dce0de89.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0aee7981-c436-43a9-a67f-9dd71499b388/28319429962.pdf
    • https://uploads.strikinglycdn.com/files/658fcef7-3ba2-44ed-af41-7b2ed3bfaa02/dupesitunezo.pdf
    • https://uploads.strikinglycdn.com/files/f67f1e3d-b796-4bd8-aa69-f1cca971a036/vawalirolabadatasonawurex.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f141.bin
27aa81caff02322307a3746b72060655d472ba5f62fbade91ec1c2f38003fb04
pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 5764 bytes
font_01_sfnt_off000104f6.bin
e22975a046cc2521bf7f614677affeb965cf00f456be6db4f1ea2168d8298b4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F6 10312 bytes