Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d95252d66aad5eb…

MALICIOUS

PDF

89.0 KB Created: 2021-09-03 01:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9e350f21dc8fcb06b83d03d5470d12b SHA-1: 2a5c44bc3b28fb826e616fa21cd23baedf4d85db SHA-256: 2d95252d66aad5eb7550dcaa8de015f2c70837678ac7a2809df2ac5ccccc5e85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=sinupret+extract+packungsbeilage+pdf PDF link annotation
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/letejugexut.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/f71ed3679d4fff7680d1b2c1bf2a76cf/53290758810.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c393eeb9e7f---vizezon.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f0f412367---wamivuvukavavadutor.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770999cd8cb---66527615935.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16078f32c258d4---vetagipafor.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/21898508986.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/nibalubekefesadetudalubu.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/kuzisuxono.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090707b5afe2---91277700180.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/b3e071fd9b9fc975f13a6e414c978b8d/18588130753.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/50909626624.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/memedesalotawij.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083482b0a833---gamiriwosekilotogu.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ca6ee858---doxirotazemazadesivifap.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/30641499998.pdfIn PDF document text
    • http://newmob.it/userfiles/files/zegojizabadodovet.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/juvizexegeguxedisemuk.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/21406328473.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qkmi6nk4oqviabheaobet8ilbn/61578451998.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/vezufokurokofovopulata.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/mozakakunomofowixagozan.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/faxod.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_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 19448 bytes
SHA-256: 19ac7158af4efac50b9a3cb0254010ccbe411193463f41c06a72ce6c6c05b066
font_01_sfnt_off00012458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12458 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6F 11184 bytes
SHA-256: 5ce2bf0410d7abffc673473e9c926b12e6fa424d86eb3fb3db7b70895fe15bda