Malicious PDF — malware analysis report

Static analysis result for SHA-256 faeb0adbee381745…

MALICIOUS

PDF

81.3 KB Created: 2021-09-20 22:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2c2ef2aaff43d7359d5705795b22907b SHA-1: 3575913eee088fa7084c6dd0d98fdd71cae32f0d SHA-256: faeb0adbee381745242945eb6b2c1c01a60e8ad15e4f1559d11273ed70da0105
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a visual download button further supports this. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crysiq.ru/uplcv?utm_term=super+mario+64+ds+nds+roms PDF link annotation
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/noropa.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614574e2d03a7---34808084882.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/dolefikoredapaberemuzif.pdfIn PDF document text
    • http://packamate.com/userfiles/92768495432.pdfIn PDF document text
    • http://agrihitech.net/media/ftp/file/35318940081.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16131020a83b0a---96807181544.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/41585124199.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/56464431614.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/niwibewilirenobavid.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/xotowebugurifinisefut.pdfIn PDF document text
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/wevese.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/4995758735.pdfIn PDF document text
    • https://kaparatt.com/images/File/lomavobilumosojamazamibo.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/4426815544.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161402c85a04af---91747150733.pdfIn PDF document text
    • http://mobiliteit.nu/files/29143495542.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/b50110abf573a6c31e779c0d910db4f9/14041770834.pdfIn PDF document text
    • http://rvhifi.cz/files/file/sewojajikugetazasemor.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/putozulugewaxitezatem.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/zatagevigijamotol.pdfIn PDF document text
    • http://iphysiology.ru/upload/89284420714.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/18450957921.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/tanemavatarivilizeximiv.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_off0000d494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 18664 bytes
SHA-256: fcc6e3caa7efa54cade08767b06782481be1d3f3d330cd95438f21d385465fa5
font_01_sfnt_off000104f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F4 10832 bytes
SHA-256: 834d8f532616d48ba752d02881a20f68425561d43b3b3c17f194646e2b638360
font_02_sfnt_off00011de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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