Malicious PDF — malware analysis report

Static analysis result for SHA-256 f714919fb8f26015…

MALICIOUS

PDF

86.8 KB Created: 2021-06-30 06:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ba2860e63a57248ae5d030c26b8873f SHA-1: ea005921d39e000ed45b51e23ffc107fc1e252cf SHA-256: f714919fb8f2601548cef0e0b30baa9f1b0bfb2fb56fd1b1799ff94043deefb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to lure users to phishing pages or download further malware. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://coretry.ru/uplcv?utm_term=how+to+cite+the+gettysburg+address
    • https://deniz-sogutma.org/img/userfiles/file/kutepovipibibimotunife.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/rsrnia0sn9s69rmq7llhu8tngs/79876376887.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782bb306df5---45233126131.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2ca1718c914f8c97fcd3e199b855a4d6/gugexelizutax.pdf
    • http://naturallabs.de/userfiles/file/gubaxunupuv.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607de9a0bc7f1---vulegaguwoturenu.pdf
    • http://bociany.sk/media/file/78659687696.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5347619dbe889261651e91004cf35ec4/11886355672.pdf
    • http://perfekttorun.pl/pliki/rofukezosov.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f5954d81a---jizenemipug.pdf
    • https://pnlcoach.com/misc2/file/
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee62823d88---423619463.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e8c49bb4d771cbfd410e885c508acf22/60622334219.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ccc66ad80---sosodalipovu.pdf
    • http://pphjako.pl/userfiles/file/kibeb.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/47d39c973275078d553f25bbc454ecf2/runiviwamomupafinekege.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc70b38e53---87157529108.pdf
    • https://pfhotel.gr/ckfinder/userfiles/files/76140722168.pdf
    • http://anvlaw.com/userfiles/file/28354024160.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecdbaf0656---sojimigelepiritad.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3fc1e501c---8898308670.pdf
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/kodataxuvefituxorevidega.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a353a929f9c---69161735619.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_off0000ee4f.bin
9f8058d16ab8fe9a79c614b5e2205e20c23ea020dc12786d10cfbeb6728590f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 10932 bytes
font_01_sfnt_off0001079f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 16792 bytes
font_02_sfnt_off00011fb1.bin
3488f35400f512fd7929e53389e46013ba8515c4495773ac370576555c0d599d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB1 17100 bytes