Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4be834650b008df…

MALICIOUS

PDF

72.6 KB Created: 2021-07-30 03:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 9746b6f69486049a0f81ef68fe302d88 SHA-1: 1e7bc8d4042926d5c02a003d80ddb48c9b927baf SHA-256: f4be834650b008dfc25cacf5afa5844ba12dab02cc56ff281940cc46576b941a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, hosting numerous links on compromised CMS uploads, likely to facilitate the download of a second-stage payload. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a304798f3---jejadebefakenixuxenosaxut.pdf In PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/bagekaxajabatigimakax.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/89917570830.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/c5807ddf88acdbe58680d3d4b2d795d0/dijuxapukexatep.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/27768122888.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/5f7846af84151a0b5a04bc7c03263cdc/66892375047.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/31005337901.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798027941d6---93997595560.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a83d400fa32---pedepepus.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/87577452418.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/022309064575.pdfIn PDF document text
    • http://orlickachata.cz/files/files/faxug.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717be3cef47---6501691245.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/wusuvaba.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/99952994438.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/i4tg68bpa70n5r4cefqjlm2lp1/93255489731.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a1ceba117---81335687526.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/3774eee5e1d3c7dddf83ac70dd6acbf2/43857760315.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/lesabobogezebeweref.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210517135345.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/90tel77r8mjgr0uvf5ofmpg5ns/bewosagofinibekek.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/1jhp135sjclah2cs2mhqdmcr94/87722615435.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/45qr8tqiouq2imr6ecv5g5j5gr/77480677631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=e+blues+scale+alto+saxPDF 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_off0000bb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB08 15880 bytes
SHA-256: cd715be8dc15d87d39af488bc4190ee074dfef18b47063f45a239e7a1a80a5cd
font_01_sfnt_off0000e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AD 10252 bytes
SHA-256: b78977fbca308bd9c44e1d62484399da7340039da1148df33d2a22f06844bcc4
font_02_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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