Malicious PDF — malware analysis report

Static analysis result for SHA-256 160abacbffefb582…

MALICIOUS

PDF

88.3 KB Created: 2021-07-03 00:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5fb1084ab6cf2d1073c8755ee8d5f7c SHA-1: 6de8af9bd3b9507b9a5f169e82826b2f2d55575b SHA-256: 160abacbffefb582c4a6b8fb01e36fa197ee5d170c33bce89eaab78adbb6d18a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS platforms and disposable hosting, likely serving as a distribution point for further malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it is designed to trick users into accessing malicious sites, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dd-eng.com/files/files/subavimuvagevapogidarovo.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/e762fe58e3c7793c1494f618ccc1d145/65969317890.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607009f92f1ba---17482954007.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/pudagizogup.pdf
    • https://sindonis.com/userfiles/file/79805800688.pdf
    • https://west-holding.com/userfiles/file/14546027076.pdf
    • http://scoutpate.com/userfiles/file/mukajilarebalox.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/df362ef82daaaf12c5c7d2ed049ff25c/66569458978.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac63fa4d547---marukewibivasedexoxe.pdf
    • https://stiff.pl/ckfinder/userfiles/files/36402480430.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/a3gl776ml0prirk5db83q31gl5/wesila.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b37fd7cede3---pusepowakubupepewededoju.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9f82508a---mapuwupimum.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160875b2e08a07---24451935021.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c19d888efb6---ligalekoxoxometewirevir.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/rikiku.pdf
    • http://thailaundry.com/imgUpload/files/bamepo.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00506be79---takodepaxufifuforisuv.pdf
    • https://pellevah.com/upload/files/rurulizaz.pdf
    • https://vannordenvastgoed.nl/userfiles/file/nevep.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160805df674bf9---61915075311.pdf
    • http://bundoreh.com/fckeditor/files/file/18232496830.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834b7d61dc2---poxiju.pdf
    • http://networkinglikepro.com/ckfinder/userfiles/files/komipepaxiwizodowokexu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=once+upon+a+time+2017+chinese+movie
    • http://irodori.kir.jp/files/file/76577828877.pdf
    • 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_off0000f36b.bin
4a2ff9dd72639674619b4adf290ec578fc3676beaac590e51b65bdc2d730e06f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF36B 11028 bytes
font_01_sfnt_off00010d16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 16792 bytes
font_02_sfnt_off00012528.bin
04a6c6ae6dde1f6f5841d494a21704fdfe0bceb2635b7bcf4b31eb9305556508
pdf-font-stream PDF embedded font (sfnt) at offset 0x12528 17232 bytes