Malicious PDF — malware analysis report

Static analysis result for SHA-256 199933b293f1847a…

MALICIOUS

PDF

87.6 KB Created: 2021-07-13 17:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f5d23f9f61fb2d8895dbd006de423282 SHA-1: 1a0c3487cb59e6c39059ff0efbd63a8e50f55a54 SHA-256: 199933b293f1847a07f34ea6702884b90d0d3f6daf9f56cb85aca5341c329c03
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or exploit kits. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=god+of+egypt+movie+download+in+tamil PDF link annotation
    • http://esistore.be/userfiles/file/tunonusawito.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/66852972418.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160988dfc618eb---3928278931.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/abe7c1f150452246d6b53b3764013b0b/lalutiduwifebiwejen.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/76091803481.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/qludcuf4r9n9mc2s2usaunkjnc/81060496236.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/fepitipemazifarevabame.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609168bc40281---85657707346.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/ec89b98130406e91c5777c88308817a0/bofolojaja.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dc8f33c70dd---65861423477.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/3444516741.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/t17uc9b5on3dmjcone1d0csu7h/bedalujupefunuleruviwural.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912f7a6aec1---seporatewage.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff22269d1---suleraxijitabisinul.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/79229339419.pdfIn PDF document text
    • https://ka-base.no/images_content/file/nizerised.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/87e28081879624683899e41f5cad10e8/lupibixojefupajomem.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb5de1168---bujokeroril.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/vuratoje.pdfIn PDF document text
    • http://siembra.me/uploads/files/vanukigobobetijiralujawi.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/7af68f1943f5e2f3b159de37c9a72711/resuf.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/lejomixotanuvap.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fb37a8a40---1073377915.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/pp4hfc8ago55r9ghav0gv1kfn5/rosuk.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/51703087890.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_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 16956 bytes
SHA-256: bb8fe2a4c3599efaa93db7649d3ac86c39f45250e2db592588ab4f80fcd764c8
font_02_sfnt_off000137b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B5 10880 bytes
SHA-256: 440ae664adab814e2f1120e7a16e95f8f3fb77c95c81b27e9b191420857c66df