Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eefb139a3d20379…

MALICIOUS

PDF

76.2 KB Created: 2021-06-22 15:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8e861774c4622c97ac3d4f8300a4abd1 SHA-1: 0845ee5e6c3a1a91e155019b14c514036a09e322 SHA-256: 5eefb139a3d203792647525b568a1598eeb138ad62669fed3f1d1969eb44133d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The embedded URLs and the document body text, which mentions 'download windows 10 media creation tool 64 bit', indicate a lure to trick users into downloading potentially malicious software. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6739154fd---95380725008.pdf In PDF document text
    • http://unsersohn.ch/images/file/gotamokewesexod.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/77935748041.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/08f122bef4ec2cdf750ea6a7c1838aa0/94681355261.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd49f39048---7935826107.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c35fa2eef293a48c5bb65375ed2d00a1/kanemelafinelerolez.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/gogatoguzuremenifomugu.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/temumew.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d784170f8---14183491993.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/fekavivutobosudurevizuv.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/9d40e25c3783a57a8ebda60bdde16c66/87552115608.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/judugetove.pdfIn PDF document text
    • https://noddy.nu/images/file/xusuvevijosimiz.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/refefogededotukutap.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/111e5592c72f0f5fe8ac00e8befa5250/91847666315.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5602634739---karidosenexepifenisod.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/tugamisuved.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ec06ba94---17793835570.pdfIn PDF document text
    • http://2440027.ru/upload/file/45256093493.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/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=download+windows+10+media+creation+tool+64+bitPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 5752 bytes
SHA-256: 1828fad197405d72fbe2b6e88054a8d322924fa8cde506106c57b56917be0247
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 11208 bytes
SHA-256: 1eb9cf869dfb78c7aa04590ef34f3c2d53c3ee7e0a33db308e67107c8e571a37

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