Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e63fc441683d03…

MALICIOUS

PDF

88.0 KB Created: 2021-07-03 02:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27d568265270f3667e2201e4da9877df SHA-1: 177d94dcdcdef8b216a9bd01ad7719aeb263d17f SHA-256: 11e63fc441683d0319c62707f39000bb1beb46f8e9de8e298ec54c9fbbca0194
236 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam and MFA harvesting lure, as indicated by heuristic firings. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing campaign. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 8

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://oniceh.ru/uplcv?utm_term=form+fill+seal+technology+pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d7076762e83---65801875157.pdf
    • http://elitvorota.ru/f/file/pevugorefusamodokajilo.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cf236655224---kowimadapatirewuwisigebem.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0f9be284c---mawisudujipegaporoj.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c127f55d8ee---laterefafinasesafetabo.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/75f2scfqcs1pp3thtmco7bsth0/84180082713.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/1ff7492038d9b2f761884943020936e7/kilugokesuwomu.pdf
    • http://crmrealty360degree.in/userfiles/file/22089047678.pdf
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xowerugexego.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5229eddc4e0a1b4f19be0df8a38a1b9d/79137592043.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/45bbde1ce83db2668f185e700c2a3f5d/12916448070.pdf
    • http://supermarketdv.ru/files/file/77160077402.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e8f5c6f5---46393628343.pdf
    • http://baugeraeteverleih.de/benutzerdateien/zefilojovejudas.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f6878fdc7---metegotadebunot.pdf
    • https://medtek.vn/storage/file/winem.pdf
    • http://ballstonfamilymedicine.com/clients/861402/File/manudiverusazukunutoluxox.pdf
    • http://aldo-ins.com/userfiles/file/dofepogukikiwikadovazovu.pdf
    • http://podiummoda.ru/userfiles/file/wozozifodofarerawazadu.pdf
    • http://studiotecnicomartani.eu/userfiles/files/83011013832.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a58b30c72acf82cccd774ecb7c2ccd3c/4298780195.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/50a86a48c733084d9f5882b905d902e3/dujekesiduzadazobajozafak.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_off0000f520.bin
0fd1868782373c7a9b0865fbb0e527884d7ff0d17ff5156b239bc7a581df7193
pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 17208 bytes
font_01_sfnt_off00012232.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12232 16792 bytes
font_02_sfnt_off00013a49.bin
78555689df72ae043356c8f442c23c18f353bba734048970d0ad1b998f7aa725
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A49 11160 bytes