Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44f186bff257aea…

MALICIOUS

PDF

69.5 KB Created: 2021-06-24 18:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 67d6032fc2fbb518d473b91cfa6a3f03 SHA-1: 274e6be484bc6e2b0e24a3ec1f9e69cd0e9aaf78 SHA-256: e44f186bff257aeae226d6803b3c263ca3be6af27707222e10300db2955e8aca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, that point to other PDF files. The document body, though heavily obfuscated, contains references to 'pubg lite hack injector apk', suggesting a lure to trick users into downloading malware. The presence of external URIs and link farms indicates an attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

Heuristics 5

  • 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
  • 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://jamessham.com/admin/usercontent/file/12005542762.pdf In PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca72d51e76---92249584476.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/dazekanikugalu.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/72423469350.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/54349026261.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/65701b767bad2ffd1221d6da749b89ae/nibizaxowujuzaxusose.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/kefogiwekekuxirefu.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608746f87f5ea---10363685715.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/n9uclurma9tf63a8fvk8vd2ci7/woban.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/96521417024.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/2c9ec6ea07d079a329d9289d94c39629/damilebabasapokolavewo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab932524b8---suborilimurivuful.pdfIn PDF document text
    • http://benrassam.com/uploads/files/zubepavopunabedakuz.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6948d2fcabd2054d5dbba0aae1afd99d/logotefoxuvenu.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4f5b80b7e---5385349364.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca97e24e0af---bewozodexudoxasamedeg.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/zodarajevifamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pubg+lite+hack+injector+apkPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 5300 bytes
SHA-256: 2e79db4e0e41c94fc0af5097afd4def13c1be8a241c4b60cbd3fbcba7217eea7

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