Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfb60da906ade36…

MALICIOUS

PDF

74.6 KB Created: 2021-09-18 00:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 44a7bbc1026c9cad5f6d4f2fdab6ac73 SHA-1: 37cbb02b4ce6df4d9691a4ab9763175dceb5e285 SHA-256: 4dfb60da906ade36bd30566cca04310a3fc6a4c8b247cc42959f4972991d3674
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to disposable hosting or compromised CMS upload directories. This indicates a link farm designed to redirect users, likely to phishing sites or to download further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/51954706147.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7691f75ea7596f0ee4b69febe1fd22d3/22574662120.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/bikaletiserupojuwazaweg.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/24265963155.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/lajupusevizitesafaxale.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/m7k6p4oh34gqbvviuoctaa7hi0/29414003706.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/gezivogarawarolamoridokuj.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/6378184322.pdfIn PDF document text
    • http://budka39.ru/files/60308958811.pdfIn PDF document text
    • http://wych123.com/upload/files/25384279314.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/xatukajonogat.pdfIn PDF document text
    • http://apart1day.ru/file/71645787208.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/ladogabederazuwawuwut.pdfIn PDF document text
    • http://samtekelektrik.com/files/37694924410.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/wukipozuxififolukow.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16141121229cd2---gawenuruforot.pdfIn PDF document text
    • https://activepymes.com/pub/file/12585187634.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/zojuvegasirifezumirez.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/87757249867.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/teloziwogakejo.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/53386379749.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/lekukiwi.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/zoroxupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=wwe2k20+apk+no+verificationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF71 10740 bytes
SHA-256: 7894a3254be744348b949b3e5bd2b59f75181d032bb2647c4cdbb08344ba7d0f
font_01_sfnt_off0000d867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD867 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 17236 bytes
SHA-256: 64159641ac125c95e92cf79ac52a4771f9c3e484fbaaccb78da76abe0676a4dd

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