Malicious PDF — malware analysis report

Static analysis result for SHA-256 06653a30569563ca…

MALICIOUS

PDF

86.1 KB Created: 2021-07-15 14:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 395665fa5b7f8bb2e286a1ff82e26a7f SHA-1: 31bddda9716720a1b38e623da7efb2ffb31921e2 SHA-256: 06653a30569563ca1c3b79a99ed51a046c9e7a36cff06e27c407dc42bf98ee2c
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis confirm the document's role as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://crysiq.ru/uplcv?utm_term=curdling+of+milk+is+example+of PDF link annotation
    • https://aihr-iadh.org/uploads/FCK_files/file/navalajegogomej.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5e7e7ca05---82994310797.pdfIn PDF document text
    • http://boxethai38.comupload/file/30800288215.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/bebukiro.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/83315860584.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/8enpjccbj8slpje16o5n0vj7p4/fifenerilov.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/535fea57f45c5c1d1dd560e498d25047/duxivozanomam.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nrtnt24jjpdo94h4d8pfelah43/67629933628.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/pafivabana.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/mubovixefidepiko.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/1t26qfpb2988iks2qhejkoq5ai/kiluputejenifu.pdfIn PDF document text
    • http://absigorta.come/file/77970825404.pdfIn PDF document text
    • http://ooexperience.be/assets/Image//files/xelobekud.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e00a4add6149d5ae639125795a1b1c40/nefemesikejuberuz.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3fc09c7ca---15349862601.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50105805997.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/49lslbfianrsva6ojaemsos806/68090283079.pdfIn PDF document text
    • https://afayl.com/userfiles/file/84043653570.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/eef0ab0f88ef23728bdafdffb9de0c52/59838321616.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/55653230047.pdfIn PDF document text
    • http://belst.by/upload/file/repuzavisejevufimif.pdfIn PDF document text
    • https://digireg.org/upload/gepivasovawoxi.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/27508631705.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dba9a129b---5049436420.pdfIn PDF document text
    • 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_off0000ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 18076 bytes
SHA-256: 2b6c8070c85f082ee00a6c84fa89eb460f7bd7a020995f3e4ed34720e83d25c1
font_01_sfnt_off0001197b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197B 11068 bytes
SHA-256: 41a419bf8376c6363227d6f2d65a9d4e39689b8fbd54e8b70f360c7bb1142a4d
font_02_sfnt_off00013307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1