Malicious PDF — malware analysis report

Static analysis result for SHA-256 80029b2680f837a4…

MALICIOUS

PDF

89.5 KB Created: 2021-08-05 00:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6c1e5fc60150bef01b1dc8f2c01a8534 SHA-1: ba4fa54c3e947e51142de75e55eff877172e1c7b SHA-256: 80029b2680f837a452bfa069649fbe6d71f04b3a41d21eea1f390fd7a88c6419
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These sites likely host further malicious content or phishing pages, aiming to trick users into divulging sensitive information or downloading additional malware. The presence of multiple links on compromised CMS uploads suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160f715a064f71---6538058451.pdf In PDF document text
    • http://haumeaonline.com/userfiles/file/39394968055.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/73412215693.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/40or6tof957tai0168kpbuflj5/26233996035.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/98887832986.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/43600766954.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f5d785e8b---53406971379.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098b113ef1be---lawefimi.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/dolajarapelanogumet.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/122980764e5ec99466d2da09e31e93e1/nuzumupalupovagegetepaw.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/zoxozeg.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/sarulim.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/8132ccd09146690fc81a1df50cf9cabb/96641337424.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/pikebifid.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088c77b662f6---borur.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/vosomik.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1625591285.pdfIn PDF document text
    • https://castel.ro/userfiles/file/nikajilowafixugexib.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c3057955393---16087762634.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607edfcf8b8eb---67354921956.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210709222946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+use+dentemp+denture+repair+kitPDF 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_off0000fc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 10776 bytes
SHA-256: 26a1c60d5d749e8ce085bb4c5a80e9548b962019e17a5ad0911efc3c91ca7331
font_01_sfnt_off00011532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 16588 bytes
SHA-256: 59ebf5bae25a2723a91587f5cedcd0baa96ff0855853045421e2ec69f12bee10
font_02_sfnt_off00013fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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