Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f34a732678cee1…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 14:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8caa8ca6538bf557802dbcdb969ba606 SHA-1: d5fcc5f17eea3ff705a7f421b7cabea5ac5b0149 SHA-256: f2f34a732678cee14e8357d8145025bdb282138a4f80badab871d3881a1791f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely intended to trick users into downloading further payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092607eb0470---sawir.pdf
    • http://a-swiss.com/upload/userfiles/file/fakavaguti.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16097fb0968223---35901999735.pdf
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/voxigoruxej.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160af1c88ea972---13695840159.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/cff083db70f4d049e299d3e30af7c4df/56532813280.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0423db0238---44100390497.pdf
    • https://itexpertdog.com/upload/files/marovoxudavepaz.pdf
    • http://tinnaduraflex.com/uploads/files/59055740338.pdf
    • http://czdashan.cn/uploadfile/file/2021051105091973499.pdf
    • http://soepcentrale-dekeyser.be/userfiles/file/88944651061.pdf
    • https://myphi.biz/nbloom/fckuploads/file/31334830000.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/gabotupabesubobebojox.pdf
    • https://psfund.org/public/uploads/files/cms_files/1734272638.pdf
    • http://artin-intranet.com/ckupload/files/83939066454.pdf
    • http://temple.mo/userfiles/file/6365114199.pdf
    • https://grup-insaat.com/userfiles/file/27367343197.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160da5ab6ba85c---14439179305.pdf
    • https://worldcastlive.com/userfiles/file/86509613052.pdf
    • https://beysukonaklari.com/ckfinder/userfiles/files/wavas.pdf
    • http://decamiones.com/userfiles/file/46748475604.pdf
    • http://jingkangchem.com/upload/files/fujoke.pdf
    • https://nuttydog.hu/ckfinder/userfiles/files/39876618761.pdf
    • http://www.kotolantopeni.cz/files/nokasupisezufopidigejage.pdf
    • http://aimic.com/userfiles/file/61148427850.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea2b610af9---50349782120.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/7893988f56150d80ac4b80dff3699f7d/44871073767.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=form+61a+download+pdf+in+english
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3a.bin
8ad2b0a48a680df828b67e8f610f6867cbf2438a4c69801f27ca549e648e098a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 18212 bytes
font_01_sfnt_off00010c00.bin
78faf33b12b3cb42e008c4f54a92f5dd0c2c43a398f927004c38e4873af1ae85
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 11132 bytes
font_02_sfnt_off000125a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 16792 bytes