Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed0b9ee179be605…

MALICIOUS

PDF

84.4 KB Created: 2021-09-01 10:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9bb569cc46ca636fb80f714f7bdc19ff SHA-1: b871303a37c9a9755505bb40f7520bd7c9c4319b SHA-256: aed0b9ee179be605646cb15d027031667240f970aa3bf6b5881d084122b1777a
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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 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://alexlunacoach.com/img/editor/file/befigekirafurob.pdf In PDF document text
    • https://majubesar.com/contents/files/921611371.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/c4953d8085292f62ece42745e23872e3/tipadivatunolukudavi.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/m230i7c3jjb8ub7rbo7kbqc6n8/lixifilinaso.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jhc2evmchm97epqforcgln19o5/14855276028.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/44892265984.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/sekukugubaxe.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/zazufufajonidobo.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfe55dd07c---68088698513.pdfIn PDF document text
    • http://seamacros.com/upload/file/29132105873.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b71717d833---47003918477.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/vugojilijozig.pdfIn PDF document text
    • https://e-midas.ro/files/file/pelol.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/4a3e478c4ddfa0aaf6c703f1855e14a0/savijunuzolotulo.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/788446189.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/1010680550.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/pk9dd8visk95joosoaofdlg676/22634534556.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089aebe61005---60530404775.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/89880092576.pdfIn PDF document text
    • https://bor-diing.com/upload/files/57715145304.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/59347582493.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/80917106983.pdfIn PDF document text
    • https://tarsiman.ee/files/file/27231215202.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a16b621e7b---91297951092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=pdf+reading+softwarePDF 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_off0000e2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E6 18484 bytes
SHA-256: d78c332f5d3afb0f3893f1edac3dd62d3b6ea4cf94ae7661c880f672dc5cf12d
font_01_sfnt_off0001130a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130A 10568 bytes
SHA-256: 94d1aa4dec16725eb4709a69b79d586656bf2c08c95769bbbcc1286b8eee03fc
font_02_sfnt_off00012b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1