Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d8d2b349b2f478…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 17:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 642c59d25a11cc79f1f86c3041c71102 SHA-1: 80aa50a45b3bbf2301aed683bbede65e5171f821 SHA-256: b0d8d2b349b2f478e4235d6e6523f2f7e231408b342ef5aa2bcc5e703b6fb43f
204 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports this. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://minhledtran.com/luutru/files/74131107022.pdf
    • https://darshanam.com/ckfinder/userfiles/files/23009700457.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306c83c515a---27525459014.pdf
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/98271614128.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/13591437899.pdf
    • http://chengzechem.com/upload/files/51614558622.pdf
    • http://slstudio.it/userfiles/files/7918446460.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0efb0647f---99262207224.pdf
    • https://uleshuzataruhaz.hu/files/file/61984388333.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c26c8a089d---84134090827.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/88rcasgq4e31fl33l07rttgoo0/xigezubafisi.pdf
    • http://langfordfinancialservices.com/userfiles/files/nilalemewenogemigegebo.pdf
    • http://gpp300.fr/userfiles/file/82319395872.pdf
    • http://area100impianti.it/userfiles/files/sinegazofofajokifexidoder.pdf
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/37260598589.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/62401607809.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161343622d3bad---95158404200.pdf
    • https://ceccargiurgiu.ro/userfiles/file/88009205532.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389745a9660---23416579448.pdf
    • https://gulf-rope.com/images/bulk_images/files/dadisume.pdf
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/rodedelaxolupude.pdf
    • https://motiwalainstitutes.org/userfiles/file/30111351880.pdf
    • https://ekransamara.ru/files/wajotevafereba.pdf
    • https://dragonexpressml.com/userfiles/files/tiluto.pdf
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/58251004985.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=brothers+2009+full+movie+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC5 16792 bytes
font_01_sfnt_off0000f2d7.bin
63390840729bb8407ebcc697116be331a4a789a4ea400fc6dc2e72b3defe5a60
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 17348 bytes
font_02_sfnt_off00011fb6.bin
86a36fd7c6c70503882612242ec2b4070aefb0762b3da2a64eefd9cbb4b8a398
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB6 11336 bytes