Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cba6728e25a226…

MALICIOUS

PDF

101.8 KB Created: 2021-08-19 09:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 85d12710cd5414db9c16028197ce30a9 SHA-1: 20d05c25d271b208ccb29f8d1cd8c207aeacb3a5 SHA-256: 69cba6728e25a226e7779c532e3d41293961fd171eac1864f48561b5ddba2e56
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute phishing content or malware. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://pixomot.ru/uplcv?utm_term=how+motivation+and+emotion+are+related PDF link annotation
    • http://thedewakohchang.com/image/upload/File/8154175839.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32421863f3---menilazawenarudixe.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/bemiwo.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/14627389197.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ed6abe2f8bb125f153e68e1271e1681e/porikosugotazine.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d6904f4e---fozutamusaduxewa.pdfIn PDF document text
    • http://eunlocker.com/Images/Editor/file/lesirosajixanaraz.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832e6b4067e---delamo.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/14830534985.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b47193a96b---54561525309.pdfIn PDF document text
    • https://associazionebriciole.it/public/file/komubexogalizubunafepofu.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/tewenamexusikuperolop.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/de2536fd5ff3a01a61530fd1f62bbccb/rogopoj.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/kodefukovaditex.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/85246351320.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/goxewerefexenimimufeso.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608606f756c71---vimaxoxusifapokukak.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/pegij.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/xalawodajeladukeninawu.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/rigafifanefenekozefarobek.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_off00012d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8A 17008 bytes
SHA-256: c35fec114b80278834588f4bfe3a1630c9e40742cd6cf6b42bad54ef0d072a10
font_01_sfnt_off00015a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17221 10384 bytes
SHA-256: 888b7719b7ccbae7810fe1a824f3642fa0a40361bcbe4490ae59c97f669303e4

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