Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9895d3f9908f905…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 23:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c4d04da1ffddc4e17d64bbeee258ece SHA-1: b0312f9e0805c44b8d24560b250718a4543d667e SHA-256: c9895d3f9908f9057820571af5fa2ddd336a6f52a09ad1c4d77bbc64e4ac2b09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate maliciousness, and the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=ajcc+breast+cancer+staging+manual+8th+edition+pdf+free+download PDF link annotation
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/st6o7484s9v1teceiv4gjpdl31/tizodopopetepabedo.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/fejesifedumavirox.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/92638681915.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/9650772412.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/rekovosipini.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/sesezagal.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/51288912313.pdfIn PDF document text
    • https://premium-house.uz/images/file/gigokekumumokeziv.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608ade41d7971---65081918201.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0307d5f51e---tezerusogitusuzosigada.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/48463815931.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a4022e807---56443847863.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/24239866753.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d82a9596b---fakonu.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1ba49ea98806a6b077e6c0a1fa2eb3f3/funomotuxesizug.pdfIn PDF document text
    • https://arerp.kr/data/file///vigulepepasot.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/64990071885.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2ffb1143---4800158981.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/0vnorba8fk6c1dtlk83vt4t5in/furosuxugud.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce06d3fb2---44196129392.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df7d110f978---poxopijitapojenazikoge.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/25f8cae690d5e004c0f2c470da498327/10295859428.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/13144503680.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66596ad242---62890867447.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_off0000daf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 17712 bytes
SHA-256: bd1fc9e3861e12c72fdd4debad122a4c7a7f4c3dd341495cfa8aa7f5253e1bf7
font_02_sfnt_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 11712 bytes
SHA-256: 573e1eba1a225665514993584024a5eb95db1a52813703ffd971549aec75c445

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