Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c17f7cba7a995c8…

MALICIOUS

PDF

97.2 KB Created: 2021-09-05 19:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 15fcbc33d01cfdf6091436075f87aabf SHA-1: 634da9afffb139126bf25f495370b16d93469acf SHA-256: 0c17f7cba7a995c844e95cd0e44db8abf8016e815661708b146a3e827682e971
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links indicate it is likely used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://allytemp.ru/uplcv?utm_term=floureon+cctv+installation+manual PDF link annotation
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/7466f88fae911c5dd441cf178e948851/lumegetelazuzinofewuno.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/694a6ea43f851302a0af1c0f668d8818/mubajufujododojimozulexi.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c854ca74f71---17850629741.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c0e893239b7b7ecf9ab8512f2941b8e0/pijajoxabukob.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/3k27vfu0ete2gnrre3gfo0163l/24889949102.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/eee5449256004dd53ed1c1e3904f4996/lonimuwanogasara.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/30353494366.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/sazuwimetu.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/13127325721.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eed1509eb---98284211860.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/7fq3cq6osi6231sqeahc7eblgv/52680887766.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/zaweru.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/kasofadoba.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/n6m22hn06egm8jf6mbafefncgj/liludamidajufobe.pdfIn PDF document text
    • https://red-adlay.com/upload/files/45349763951.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/pigisuxabasusul.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/riwojaxuk.pdfIn PDF document text
    • https://forssh.com/userfiles/file/sugopupo.pdfIn PDF document text
    • https://jobtiara.com/files/files/bizovunajipam.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/fajiseletixirinop.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/kuboxol.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/im0c4dmtaa8qhoa789t6bq2nq5/puwedavadovizelunom.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18583fc34---81719581343.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_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 20404 bytes
SHA-256: 783e3ce6094667864b84ad446cad1d35d832796eba32c70270ca2df2da59c303
font_01_sfnt_off00014737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14737 10536 bytes
SHA-256: 7f0d05ec21d0fd9e6922b6ce31feea57cd9c97689031e692cdd7b5e9f3b8a856
font_02_sfnt_off00015f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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