Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cf8e07495e9a8c…

MALICIOUS

PDF

86.5 KB Created: 2021-08-08 08:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fe7f8742b5fb75ac524b6953cb32ac60 SHA-1: e44d04e51f47912dc0f54f18d79038d6f3f2426a SHA-256: 98cf8e07495e9a8c00ef20dfb05ab62aad07fd8120aaaec43b0999656ac130e3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

This PDF document was flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a lure for multi-factor authentication or one-time code harvesting, consistent with credential phishing. The document contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious landing pages for credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/6879e5d677eca8faa0dd3f6c9ec4b53f/monawujozokukajuwedo.pdf In PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/p2sed7llmbtjknh7j2o1ebobpn/xufolosozem.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/buteji.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/sadiluxawirazivunojapa.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/jiwuzefu.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9689656011---jomiganisurupig.pdfIn PDF document text
    • http://haileylusk.com/clients/e/e6/e6412a3df854040bfb282c4f37eddf02/File/gipisovenovasipamawun.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/zafujezodowetalujutu.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/31537678992.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/93173603091.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/bc040efc3e7ad239196c1d3fe1e51805/70952405111.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/e68ae7e9a48f1aa28a6d5f387a04f957/51591069179.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/nawavepagetu.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/55745273491.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071d9f697ece---10083487287.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/moxosezulasumir.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/luwofajiti.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/3f959b54f5b81e2f964a12a718821794/29073971330.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/de49c0792683f19948d30222e9b72e98/70476882670.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc08df257a---wuxeretadodisudosun.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/71ad0bbbfe63da3cad0bc8b3991a6129/4939219281.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608926a48e887---fikotevuxologegofaludop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=cracking+the+coding+interview+6th+edition+filetype+pdf+free+downloadPDF link annotation
    • 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_off0000e311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE311 24448 bytes
SHA-256: 01274ba836f11dbc4d466a0ee398d47bd24d88ae2f3302a0c12a8aff26dc0018
font_01_sfnt_off000118d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 11288 bytes
SHA-256: eeecf0902fce7eabbe0fe9cf5415fe7d489c77519c2969cbcdbbb47816bbbfa5
font_02_sfnt_off00013332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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