Malicious PDF — malware analysis report

Static analysis result for SHA-256 4626d69b0973666a…

MALICIOUS

PDF

86.7 KB Created: 2021-09-11 13:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9d1a4b802ad956bebae797cfb1169f1e SHA-1: 3ec4bb9a19fd2cf1b7e0aad9cc4eba6fb71d9023 SHA-256: 4626d69b0973666a951fb56f0e7f00689fac5c6870a158333ff0e905edf54636
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS platforms, suggesting an attempt to distribute further malicious content or phish for credentials. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic indicate a social engineering attempt to trick the user into clicking the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://neksav.com/upload/ckfinder/files/78375682046.pdf In PDF document text
    • http://kwiatmetal.pl/userfiles/file/96211102037.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/89266830734.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/kevuzera.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c8024bce---jixumomejidolim.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/7322073994.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/bb8ba8030fe55a42970d2fa57ff73551/75695644625.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/45465978011.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/kivugip.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/36428779801.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8d270fdf423b32636aacf94b4f8c5d86/82765381721.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92487615868.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/xojuger.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/xexije.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/14254897217.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/58301555128.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/rolosojidabupijosubuwe.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/cff256d5a78c3b02906daa8d27f012ce/11841337184.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/fobuvaretidipekisabe.pdfIn PDF document text
    • https://clickbox.ro/images/file/19468855676.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109041958235487.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/12260905194.pdfIn PDF document text
    • https://ismart99.net/upload/files/guwomoxutasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=wally+application+androidPDF 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_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A4 10316 bytes
SHA-256: b4b474a0b443ebc7d0fceee97550fc441469774343dc77195a1ba27c67ea45fb
font_02_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 18344 bytes
SHA-256: 469182158d28d893524a9dc339359d60c514422c12b5c06d11f41f8c52f444c7

Open this report in the interactive analyzer, or submit your own file for analysis.