Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0379478cc88268…

MALICIOUS

PDF

98.8 KB Created: 2021-06-26 08:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe4e4ee4801ceca4ac6fd7224add487e SHA-1: 8315bf21c3f612184c0f0f5b797d0ba2b8b28835 SHA-256: ca0379478cc882685a0ed36b4fb6f0bee52d730d3299f9dcd82c6e5cb89b44b0
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS upload directories, indicating a potential distribution point for malicious content or phishing lures. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://denizlihorozu.com/resimler/files/3100578088.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/94712afbadb1ab839b27fb2918a2d2fc/fawarunu.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/k9v34qvednve2vvlhilicbpog3/22044990779.pdf
    • https://tenfci.org/userfiles/file/derewiguxizuxukavidovaf.pdf
    • http://liubeauty.com/luutru/files/11758086270.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7630c212ec---samirogoxik.pdf
    • http://master-sign.ru/ckfinder/userfiles/files/lunukizejurobo.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/54ecfd8a594f848b39a573c987655d48/vatanevotu.pdf
    • http://modamoda.nl/uploads/pic_lib/file/92113315510.pdf
    • http://highendschmiede.de/highendfiles/file/12988295615.pdf
    • http://dragonera.cn/admin/userfiles/file/24981536887.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hlvpagfq4r0q9j1q795cfmfjs5/mekamejuxuvelaguve.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/lelg27o6qd9dve09jsr3gfim0f/65584396121.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/6417f2483ffe172f6df13a8249fad809/niruwibakodozisok.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/c689532497a75c62ec4e4928f33fe823/68327257445.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a935758cccf---sifel.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/s5b0mbvsnrg1clkbrtnb2v7e11/68742658997.pdf
    • https://luyenthitoeic.info/userfiles/file/59014164086.pdf
    • http://screen.by/images/file/xekepesiru.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6aef8e6226---78381654628.pdf
    • http://nextgenship.net/upload/file/20210615162375886535.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b0149333060d7791e2f57453a729f266/figitaxuwi.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609702218fc37---vewedesazolivumip.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5693a5e13---28461611968.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/o009bnbvijk9oq3quf5liqpfl4/33326021039.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f2a5d4479---gifimakololitoxudetoveme.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=loving+your+twin+flame
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012161.bin
0d8ba9cf22f1b0c2559fcd08a0beccc317ed6bf1f345bd4d60527836854303cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x12161 17100 bytes
font_01_sfnt_off00014d0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0B 16792 bytes
font_02_sfnt_off00016522.bin
c1e6f9200b54a6457a7482c3df6e78224be736e5d2c2d9a900583218c4bb6907
pdf-font-stream PDF embedded font (sfnt) at offset 0x16522 10712 bytes