Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bbbf61c2c5323f…

MALICIOUS

PDF

73.1 KB Created: 2021-07-02 05:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b9792bbecf29105631bcc56e297061d4 SHA-1: 47170815000634932a4d17071f26c7bc1baec931 SHA-256: b8bbbf61c2c5323ffe021cbded6245200fdf50a55bbd0f1ec9778bf475c2d3f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous links on disposable hosting and the use of UTM parameters suggest a phishing or malware distribution campaign. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://crysiq.ru/uplcv?utm_term=information+technology+benefits PDF link annotation
    • https://condominiovillage.com/userfiles/file/tateroxubune.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/31859779767.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0bdf576e1---notir.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/eb7601f964f8cb24a57c9f89d5e92710/56306474197.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/61p4bkdojgud5ib0gp2ftgfon3/lerewuranavuguvarorodo.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/64a9c38999551ab921e9bd857a9afa79/37761827748.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b075124c4de---kilaxavasexusorugaxu.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/9fbde80606cedddfe43676843bd7abb0/golivepuk.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/50896684261.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/megoxisevekawe.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/b9cfe4de08e34cf5b109754f1ca3a738/85744316086.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fec0a99cd1---nowaxuvetizukawawo.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a336058feb8---77194836439.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/3bfdf829a55d3a0523c94514878fb9f1/mumetejelowoxejidikadas.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/74444836606.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/54d899247bfc414d034e20606aed62db/20494431235.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/39387167018.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/squdk3nbehslmb3escqf3sli15/38830426831.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861b1a5860c---zejatufepuvusoguxivo.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5dd94ea69b36109ccdbb73ae5d31fcb/97650181896.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/d9b8885ea1102c630b2214ff72844fb9/85813798396.pdfIn PDF document text
    • https://badercool.com/userfiles/file/tonafugibebifofusebejufef.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/47054376533.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6153a3841---lomifizezovab.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d150c7372---19808781153.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/233ce3148224e5f3bd428d36847e4966/roworosivopuwixovitib.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_off0000bf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF62 10988 bytes
SHA-256: 8ec3adf4944a9de1e73d763f8b7f305d335f819c3c6c32eaae5191eb5c8952a3
font_01_sfnt_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 15052 bytes
SHA-256: 5c95ee71ecda94b9c8bbe761ceb66d4bf0c0b1e7239c411fce855adc6ba134e5
font_02_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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