Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e268b979d290ef…

MALICIOUS

PDF

93.8 KB Created: 2021-09-08 07:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fbfe249f26eb4bfdbc21768f8c39a485 SHA-1: 8b8d5a6ca32ffa940545e116fccbe4f21e241c2b SHA-256: 24e268b979d290efe22adea5ae01dc9db260c5b2bb865883d2cf9721b4839149
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs suggests the document's primary function is to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://ketchas.ru/uplcv?utm_term=physics+formula+derivation+pdf PDF link annotation
    • http://zamokugrofa.sk/admin/fckeditor/file/32724555667.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/dupiwarufojule.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607663c9e8a2b---niwibafinikusabekuv.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/7ef7491c2a91ac0887895d5536e8756b/navaxapujasedirevadof.pdfIn PDF document text
    • http://southfieldhigh.com/clients/a/a2/a202dccd336a30abee2d0a4364b9f07c/File/tumugevurupexosuxozenezew.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160858b8db135f---fuluwupukosiwiburi.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/83683195518.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/8695259409.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/66493263690.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/88226136987.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/nexaderoguvevijuzej.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3c772f2a7---kaxorapunorolosuxil.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611030846885b---waloxedufe.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/79c314c96d65f3a9f2f4e67cd10c3078/zulodotenezaxatogu.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/pofejuxavawija.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/dd6cc0e5fd2aa2409935208060105dcc/nigejivizomabitilewe.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents//files/32380056596.pdfIn PDF document text
    • http://industrialdevices.in/uploads/zevovusuramudakuxit.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d33374d44---63786273218.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///wowavixoxegazunig.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/sotumur.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c990f29b1511544ab783287188013af4/kuwimofonigafowir.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/f1i2pjvkpgc11ik7vomkg9q2o0/kodewosupujezotif.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e874bac97740f20e2d5fda8aaeb7b46e/91146883093.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_off0001065d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 18716 bytes
SHA-256: ee3c33ad2e6cd18c9068cc982136cfe6349671f5edda8cbb3a0078d4fa0c18d3
font_01_sfnt_off00013740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13740 11164 bytes
SHA-256: b082e214eb03842a5c5e40561745d9719abfbc694fb7ec223c9aca40c2076d79
font_02_sfnt_off00015138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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