Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e05914109a3ea9…

MALICIOUS

PDF

94.5 KB Created: 2021-07-03 14:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49c6ba5fd2945ed0a199c2a588e95c38 SHA-1: 8ed868625792410171e272cdd27a6897e15e79f0 SHA-256: 10e05914109a3ea987b111b4a814c428f5e5349cec2fde8dc2b94dd8dd3708cc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The presence of a 'link farm' pointing to compromised WordPress uploads and the 'advance-fee scam lure' heuristic strongly suggest the document's purpose is to defraud the user. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it likely serves as a lure for a phishing or advance-fee scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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 http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/731877cff672046276d62888df839f99/72577369620.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/gul220h10khr0jv3to26irc3p4/zogovemiwegazixeduzunosa.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2296766a---65690852120.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/xalovavowaxederukozetopeb.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075a50af1a1f---fukiposizuvozex.pdf
    • http://www.look4job.gr/images/_user_na/file/fafuwewarevol.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9073c4542---pefavijose.pdf
    • https://agentcctv.com/userfiles/file/modiwoba.pdf
    • http://yngc.ru/admin/ckfinder/userfiles/files/patef.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/7519786537.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/kusifobapez.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b20e2a9abb5de67729e4c7abd3b856c3/8423842683.pdf
    • http://kleinschaden.expert/userfiles/file/venazo.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5917530e9c---75583568410.pdf
    • https://akproauto.net/nbloom/fckuploads/file/71764739957.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d50b22eeb9---gukewewosudevufasaveneko.pdf
    • https://daismene.it/file/7782589779.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/bd1867919526c19cfa726c10205bf9f6/gomupexefaripupoda.pdf
    • https://zoorichi.com/temp/fckeditor/file/92435054860.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf98138116---54980970349.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=cable+size+current+rating+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_off00010ce9.bin
1ff963c02fc31bed575840dedf7ea06206d07810d1fadbc6a9c457429bf601dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 17828 bytes
font_01_sfnt_off00013ba3.bin
7c907a5d1ab0f31d71fbb9db9b480638823d83d64896c5f31382be263d345e35
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA3 11004 bytes
font_02_sfnt_off000154f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x154F4 16792 bytes