Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce6205fb641ec74…

MALICIOUS

PDF

80.1 KB Created: 2021-06-26 00:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e105b63cbdfc401a4553ce7c009c27c2 SHA-1: 1c1f3c20ae6cb25f597fd30d0638a887cbc42264 SHA-256: 2ce6205fb641ec744d9c16de9745319f876d4ed256b65b3ed5c5a8e70d37fddf
164 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a visual download button and numerous embedded links, many pointing to potentially compromised WordPress sites, suggesting a lure to download a malicious payload. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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.
  • 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://mav-auto.ru/images/file/zadafij.pdf In PDF document text
    • http://espacioschillout.es/images/admin/file/34600052968.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/bazipifojaker.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/s2g6elts6n45l2v8j4kvds92q4/fejivur.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/17d69f51725ca7ca67840eb37b39aa5f/lefew.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/54659148541.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/1d2f9791a4d81f8628e6933a5c5aa1c6/62680932332.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/hgjjjttqmsm7t72p6tuvdedj2n/42067077025.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecd3609bd9---sazabavebagorexupiv.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/iquu5e6cn179vc53s8o3288ram/wakexo.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c6891e12f---fifikanuxuvu.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/b8ee0c1f6811c64be1810bdec558f868/walulekir.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/94623824999.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/f7156a952db326961222bcb17d1c6fea/5875810150.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729fbce3d80---jipasijibinudi.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bb783aa52b3---27255889942.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/55570838935.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/22128305827.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/bilarowasi.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/48094942020.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/gu95e8gg6q1aefvudfo91ujjg5/70950466983.pdfIn PDF document text
    • http://unseretochter.ch/images/file/47983826681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=concepts+of+physics+volume+2+pdf+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_off0000d32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32F 11304 bytes
SHA-256: 3526bdbab6625cb138c5e00369a78035e1f46e03418dde4dd09de50219bef675
font_01_sfnt_off0000edb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB3 16784 bytes
SHA-256: 9f5a626bd229f3af372cb192ffb90a8302ffbfa828acae772354d7a1dc6496cc
font_02_sfnt_off00011975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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