Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceabf207dd268c72…

MALICIOUS

PDF

83.1 KB Created: 2021-07-02 21:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d71da5f902d602b3fe3c70630fa5d62c SHA-1: 904bc2995be1d4524bf415fba416d58452a2614f SHA-256: ceabf207dd268c724852c6c978f1c9aea7a43d944be4946b3351ba53b08655c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly imply an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://infrive.ru/uplcv?utm_term=what+does+imo+mean+in+texting
    • https://mimpishio1bet.net/contents//files/saraferatetowixulazebuki.pdf
    • http://apexibd.com/uploads/fck_uploads/file/walelakusovaxakivisozox.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfa4963b2e---18529228950.pdf
    • http://elcampoeco.org/FCKeditor/file/65127240267.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859d0b8677c---91708406924.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072264277943---43550573833.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/d289995e75ad24654eb23164ff478012/28058174440.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/taxiwagalojemuve.pdf
    • https://irantruck.ir/data/file/3249746764.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2a8ea5a040323097803a792534437ea/lemapujiborujuzemumone.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ib9599tckokl6dqg6q40u2u2p0/fejosirim.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867f4d79be0---wafasojupi.pdf
    • https://yellowstonewildlife.com/tasaxuluba.pdf
    • http://dichvugiayphep.biz/upload/ck/files/baluregugexosoki.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e893cd52---piziwomumitiwenosirekep.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160badef5140b6---44452041838.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b80ac11391b---madetidukorojimulu.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a554b87fea8---wewaw.pdf
    • https://bulgariapools.com/contents//files/2832780055.pdf
    • http://maihiendanang.com/uploads/image/files/26630308058.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160821e9e5aa5d---66044650082.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79407c6b19---lekirugoresunogabor.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a781ae111---gubesadivonobu.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc6888d81---fikiforokizog.pdf
    • 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_off0000e09a.bin
4cae54d2123e68dd74b0cda7cb203342a64c4882e50d56be3520aa106ac676cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 17712 bytes
font_01_sfnt_off00010eec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEC 16792 bytes
font_02_sfnt_off00012703.bin
10513fb3b9324cc3d216745fc16b752790145a951c6c70270ff86e2e34c77bc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 10644 bytes