Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bbc52ffee5c517…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 16:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e053ff4a3b455c1d2589328967873dda SHA-1: 8e8f4133fb4b52eaf5f9adf4d39fbd7d9f13b490 SHA-256: 12bbc52ffee5c5176fe8120a91fe721ee67921e98518a5ecd3d1a37664f5bca6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=allergies+in+march PDF link annotation
    • http://zkojicin.cz/userfiles/file/lisuwomujazuxiwuf.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/ba91613d30a6651abb0aacd1eb700058/66008229747.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e2af58ba6---xurapodunuzuni.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/noxojurisavozezesokodefel.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d0ada9c4f---vonamexexuxuvuwedon.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/53146d2a7d7708fbf7c811818d5b2e29/mesomopakax.pdfIn PDF document text
    • http://dgjst.com/upfile/file/janejiponewaxozevuj.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/jevexojukekakukeb.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/3pev7hdblofsm0fl7kkv6vq09j/91837681854.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a7c8f4c35fe4903379bfe693d868f94e/92837253630.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/692e434e6706462b92f70ad286643518/mufikolorumesufuxapida.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/85387279486.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/8dhfc0b2g20l9p7g3rg3isjg4f/pobiraxirikukezanogo.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210624042523.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/sugisotiwiwojevosi.pdfIn PDF document text
    • http://mobilenmr.com/files/files/zaper.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5agrko7rud4os46p3quj0tg0b/xezowixenidup.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/cf0f03b2618355d23d21c29613a8982b/8582776278.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/af7032068f852102043191c42bd7d775/vibod.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210513011846.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/malotol.pdfIn PDF document text
    • 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_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 17244 bytes
SHA-256: f5d2672e11e36c5e2ef25e8682af58ecca4d1380c4e2d28d92e7c272394fc8c9
font_01_sfnt_off00011b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13398 10440 bytes
SHA-256: b8fefe6085ba9171e3b06ca95f733af233db27858630a1e404d3d74ff2b65d35

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