Malicious PDF — malware analysis report

Static analysis result for SHA-256 2040022ae63da816…

MALICIOUS

PDF

95.9 KB Created: 2021-07-16 19:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb9247b38718adeb907c0ae1438bb578 SHA-1: 877c537635556a0a9e60fad75cc0302cb50f6e89 SHA-256: 2040022ae63da816df1ddb2a8a26795788ca149790927bb80ae4b43f41f4f9af
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam and a direct request for recovery secrets. The document's content, though obfuscated in the provided excerpt, is designed to trick users into revealing sensitive information like private keys or backup codes. Numerous URLs are present, many pointing to WordPress installations, suggesting a potential link farm or compromised hosting used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 8

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/8c6dca9484965e130cc72a8b7101fd2f/52603512989.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160754e4593b14---romur.pdf
    • http://mhinflatable.com/upload/file/mufadelorozuziladumiledev.pdf
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/fijunikuruvek.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aee56ff08---31828671311.pdf
    • http://muzycznescyzoryki.pl/userfiles/file/97582985897.pdf
    • http://mousike.it/img_ins/files/80015998866.pdf
    • http://blatt-gruen.ch/files/rawuw.pdf
    • http://chongthamnguoc.vn/img/files/vemuxexifowozamuviko.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/a7f9e76823f280bc213233c37ff64585/minegazesulawefivimagorex.pdf
    • https://99shayari.in/userfiles/files/16232676678.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/m1sjsrh8f76jli7ra2mptdqgb1/zamoleda.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/zomikeda.pdf
    • https://www.bosingels.nl/ckfinder/userfiles/files/65339960395.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/nabet.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160be9cd7b2abd---64649402306.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f422f3961---gijojaduwefejuduje.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/3c468e7be893cb62d1d9f16d317b0ec6/jagukinekawenasirum.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6abt1q6dt86mpfjjvand21s1mk/mazawiriziwanapetomi.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf00fb79e4---pavinosatibo.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f72c20be---malusegejiwo.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794171555ee---43704659892.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070664c8068c---zajel.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/ee45c511c13e8b04f8630af2a4b0580d/porujojene.pdf
    • http://amandamaitland.com/images/file/zozuba.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/fa0e7c5e6569b5c60411497d28e21403/40981259396.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ise+2.7+hardware+requirements
    • 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_off0001104c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 16792 bytes
font_01_sfnt_off0001285e.bin
e368a32260902a34603c61090073ead8441934779e2617f5dde991011ac53391
pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 17948 bytes
font_02_sfnt_off000157b7.bin
8c5c479ed408b7c18829a68985216657cb24e96d12258981c2fdb1d5caef89ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x157B7 10864 bytes