Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d2f8c997f906e9…

MALICIOUS

PDF

95.0 KB Created: 2021-09-03 08:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f4f89b163400aacfa1f9227acfa4aea SHA-1: b463f5388d348de3666c22735c8292946249e07b SHA-256: b2d2f8c997f906e91ac5a16a105b65bbc993a10b6dee1b21daef6a92eb1c825e
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress installations and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download' button lure further supports the attack pattern of tricking users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8661f627---fuditino.pdf In PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53d065e8c---fuxen.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/db1627e89344d1cdbaf6f117f4dd32da/zixorejuzulozum.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3de8be32394a33428cd75f6d9fa01618/7367505624.pdfIn PDF document text
    • https://plasy.com/uploads/file/27812476446.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/lofebuw.pdfIn PDF document text
    • http://shepardfarm.com/clients/877021/File/20715321839.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/71106283080.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/ae5f61d995062589eca480b044aacabd/43513305867.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/99703619574.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/89254047067.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/kuzivafujosutafez.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094713d616de---72440832859.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf1681dbf---90384062195.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/26181703598.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/b0soglfrh6kkuvsg8ahb1j9g53/68721444742.pdfIn PDF document text
    • http://moristas.com/userfiles/files/40328753648.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f028f371e5---nazikemukegi.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/jojawodenutemuzasafiwe.pdfIn PDF document text
    • http://amandamaitland.com/images/file/3432023385.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160941e07382f1---67554453868.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/xeluwevuxakajovasalawafuf.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5704b4ee1---49771029807.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=nwu+online+application+2019+pdfPDF 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_off00010c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4B 18480 bytes
SHA-256: b064ad6ddec63139c96d145ef3f7a9233195d3c8886c3a2a1d2956b7d531c74e
font_01_sfnt_off00013c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C99 10972 bytes
SHA-256: 925845ae61a588053b43eba91f23bdfa4787a691fc15086e852089b7ad14a094
font_02_sfnt_off0001564c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1564C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1