Malicious PDF — malware analysis report

Static analysis result for SHA-256 67218ba569772508…

MALICIOUS

PDF

91.5 KB Created: 2021-08-14 15:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e9d8d5792a11f7fe1e7fe39c7d097eef SHA-1: ac4af98a9169308370ae8bcf84cb8454d414a41c SHA-256: 67218ba569772508f1eeff39d876a29fee0a12a3e98e7fdf31eabfcd84b206e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of a link farm pointing to compromised WordPress upload storage. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://jcpcdesign.com/upload/ckfinder_temp/files/20210708054839.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9751790511ab7c9f8776ca09cc49b322/jojuwapo.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/rajikozexebuserisef.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/2buia0hd9jvdpaois8nmu2hnm4/44197198718.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/2cfe30dfbb78be4b4d9b18cd728d46e0/menudusukekodojowesi.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b843d197fe1---rogodejuge.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/35126627457.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0a1bc75217243eb269058556e9462bf0/pagiwuwalifurinatilewajef.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7787d6adf5---88977590004.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/wizemusesuzapuporij.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/vegadodukosuzaresuvi.pdfIn PDF document text
    • http://blueyee.com/upload/file/281137574070.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/obdvme032s5rej76s226s03j70/fojinadavazurujelemilew.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/i9nts0aup1ntas25qits0ch5g7/nolowodinelepofipexir.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/36550850430.pdfIn PDF document text
    • http://hkacca.com/userfiles/zopuxivetalukareralu.pdfIn PDF document text
    • https://zzwgjx.com/d/files/limekuvenakoforilexesi.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/3sgdtqbscjspc99ismpf3jrlbb/saripiwudazodakok.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/95976593168.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210625_6729051F81853159.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/duzetizanelitopog.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/2b4cm7sm722i0pgs4vf352q9rp/56402524616.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608dea7284dce---wuzebeso.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160f0fbd577bb8---56103172691.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f35b61a54f0c42ff37b0bb385b3dd64c/27174270309.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/faxalazesuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=atividades+adjunto+adverbial+7+ano+com+gabaritoPDF link annotation
    • 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_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 11180 bytes
SHA-256: a62b97ffa7166883c8e3c5fda043ae7679f33bd6648075875491d036576498ee
font_01_sfnt_off000114bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 19432 bytes
SHA-256: 1a0bcb6c8a614989f2261c6722b193a386201541e112f45a3e0ad86a22dc8f0d
font_02_sfnt_off00014521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1