Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2eec5acc17d5648…

MALICIOUS

PDF

87.3 KB Created: 2021-06-30 12:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5677cc464b32bf9d86067ce38cc106a SHA-1: cd2038bf88838d7c5610fd1653bed24b2208cef6 SHA-256: b2eec5acc17d5648f4baf8c759226521399e134ed7976b767f853a55135e9355
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=iniquity+of+the+amorites
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/4095606b23562663b0ee69afcd54b45e/faferabeg.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780f781aa76---2502992793.pdf
    • http://yoron.net/up/files/zelimevodajobulawejuju.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a6d0de01d---81619486139.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/624bda2c122198425451e04ff60b1af8/38012750798.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/180406a328af70a70882b5d7e05123d9/70887728625.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4613525fb---tutowunujibubekatugu.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1087b9faf4---90632414890.pdf
    • http://foto-klub.dk/userfiles/file/71123736246.pdf
    • https://dailyhondaotomientay.com/upload/files/labifegepifi.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6addebc61acdcb892d81118a8cf3cda9/83158653495.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/734420113e0ad7d319f3fa99329ac00c/difekowepukawosojewaxizem.pdf
    • https://antae.be/app/webroot/uploads/file/79396068709.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb40eb555---ralosupenifewulasamo.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d47f0212b17---99235841104.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/e3l6ook2tfhvdvdb8ecgup147q/42794538900.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967e76e19cd---pilifofuduzowajapowaju.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/9a03ce50db9a00ad9504159a67fdfebc/rubavusuletidiwaxuxi.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160942929b3a04---40496707475.pdf
    • https://brahmagnanam.org/fck_uploads/file/fufokobifenukarurifixisax.pdf
    • https://steklo-shik.ru/userfiles/file/gavuluvu.pdf
    • http://digifast.cz/userfiles/wujovipetagad.pdf
    • https://alamansyria.com/userfiles/file/vixadokume.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/a5d0374a80dc8fa623463e259915f1c2/moxuwonokategasifibifa.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_off0000ef99.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 16792 bytes
font_01_sfnt_off000107ab.bin
4043a91b30c21c71c6003c7339f3b80e7dd57faa88514e88c06aece932440ecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 18256 bytes
font_02_sfnt_off0001362a.bin
cc009106a2d2ee92d80cf865ebe6de8f5e01996d33ab1c500398b001074474aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1362A 10744 bytes