Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e11f8138b4a9cd7…

MALICIOUS

PDF

84.5 KB Created: 2021-09-08 22:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0a23df757b145300f5e3eb25dd88937e SHA-1: 144bd779f4306124514008d2496c2590dbfe4e39 SHA-256: 8e11f8138b4a9cd74915af3a60ce87c84695e064445dbd5c747e971983ed6d7e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or credential harvesting attempt. The embedded JavaScript likely serves to redirect the user to malicious sites or initiate further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=how+to+connect+android+tablet+to+windows+10 PDF link annotation
    • http://cbcom.fr/ressource/site-image/files/60824679504.pdfIn PDF document text
    • https://clubberia.com/js/ckfinder/userfiles/files/88527054337.pdfIn PDF document text
    • http://elitvorota.ru/f/file/29201288213.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/27576887636.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/ligajiwapesijofavoroguzor.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/57rnc7nrgl0n91jhpvg3jgj0hq/3269319077.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/39724489239.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e696db22---86616488545.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/vitiwibigolid.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/xupemitibavir.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/70263815340.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/70564782296.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/53863720278.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/bbba30596fe93991f1cac2cfe2ce0575/kamosuwabozisulajaso.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/binofezotifaxapuserumudo.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/87461999402.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/5758553106.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/62920687750.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d97jqj0t3fefa2kfrf37ols045/bajavup.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/pajuvozadumawibafutid.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/27123510670.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/ropijeporiluvopogax.pdfIn PDF document text
    • http://wdnederland.nl/file/zikemerodi.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/zudilokozavekojufogiruge.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 10756 bytes
SHA-256: bf1ef8239015e41afa5a3a87b6849ea120f170625941bd8619c69362c2d9c5ad
font_02_sfnt_off00011545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11545 18188 bytes
SHA-256: 9885eb91eec32a1dca505a5dd02e2f3db34f51e0ff6f3771b53b2980fef247f2

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