Malicious PDF — malware analysis report

Static analysis result for SHA-256 812e6e643287f1de…

MALICIOUS

PDF

85.9 KB Created: 2021-03-13 19:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91b584f6ee18ffdbf888d8e827553015 SHA-1: 48de382a56f79d6137697f259ac249cc2775c7a0 SHA-256: 812e6e643287f1de320647e808e94c442c387edf884e92db76fc3180c415471d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO manipulation or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=cadena+de+favores+resumen+pdf
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/pibezadugabun.pdf
    • https://vejilete.weebly.com/uploads/1/3/5/3/135312445/kuvok.pdf
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/1a6ba4c.pdf
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/86e8a1.pdf
    • http://usene.xyz/maravaxululakeniguxivvg8s.pdf
    • https://pafuxasakilufa.weebly.com/uploads/1/3/5/3/135327400/naxaluvunuzaze.pdf
    • http://springital.fun/balance_sheet_and_income_statement_examplej7ogk.pdf
    • http://help-copyrightviolationhelpcenter.com/js_error_referenceerror_cant_find_variable_htmlelementd2yi4.pdf
    • http://itawegan.space/sakafutupesga65n.pdf
    • https://doxediseweroz.weebly.com/uploads/1/3/4/6/134634010/3cbd9a3.pdf
    • https://dazifefizax.weebly.com/uploads/1/3/4/8/134854215/e239fb5e46f.pdf
    • http://physcoo.com/nolewswb91.pdf
    • http://wugafis.66ghz.com/57450029218.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/28ea4086-9abe-48ec-aa8e-747fa1053296/dell_latitude_e5400_specs_2019.pdf
    • https://uploads.strikinglycdn.com/files/e9982bac-3a0f-46ab-90bb-68936d7fb216/what_is_the_main_theme_of_charlie_and_the_chocolate_factory.pdf
    • http://jifobobaganut.epizy.com/batibigapuka.pdf
    • https://uploads.strikinglycdn.com/files/b14d009e-d5e2-4e27-afee-c9b335265c6c/20417292530.pdf
    • https://s3.amazonaws.com/serogajugomiji/uc_browser_apk_for_tv.pdf
    • https://uploads.strikinglycdn.com/files/91eec1d9-4e30-48a5-9b1a-6e297a3195ae/administrative_law_books_in_hindi.pdf
    • http://nonosolagosev.epizy.com/7273134751.pdf
    • https://s3.amazonaws.com/jarawaxanivu/43984380938.pdf
    • https://s3.amazonaws.com/somisilegex/application_for_job_in_urdu.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/template_builder_online.pdf
    • https://s3.amazonaws.com/wukevirenesu/female_criminal_attorneys_near_me.pdf
    • https://uploads.strikinglycdn.com/files/a99368ae-02f1-4cf8-b044-461b283f2190/75875539387.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010103.bin
579a370cbf686e85833d083156a9aab91a02be6499d37acb5d8ffeb1590dc123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 4992 bytes
font_01_sfnt_off000111e4.bin
da0dcbe6630609752c5ea143fb070f850fcb729efff12b4022a5d879fa6c866b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 12416 bytes
font_02_sfnt_off00013a3c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.