Malicious PDF — malware analysis report

Static analysis result for SHA-256 3209246c821c6b63…

MALICIOUS

PDF

67.9 KB Created: 2021-09-05 09:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 655c14ec23abc847d7d78d9aa4106116 SHA-1: 0354e0c5e2faad6ce3d81a7931db4a41ec91efb8 SHA-256: 3209246c821c6b63dd225f3d784f33fc5173db2ea0c86864e4748130f5d10bd2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure, likely designed to trick users into clicking embedded links. The heuristics indicate it's an image-only document with action triggers, a common tactic for phishing. Multiple URLs are present, many pointing to compromised CMS upload directories, suggesting a distribution network for malicious content. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=the+bottled+ecosystem+worksheet+1+answers PDF link annotation
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa97e8c62a---35199639083.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/xenotejimekofulekamirow.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/0b01af09120b587573f336ec4a9a61f7/62913722508.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/f10bf29e47f0724ad9dc80e586e3f3ed/53494002281.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb04b3d62ad---zesefemigetukunutuguw.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f72dd078---96726543417.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/60225164776.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/konozepe.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/mezol.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0755771bca---fokovixazazepowipobebolid.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/sigifetodigumakogibolugeb.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/42679405253.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/55959392984.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/kozajumudogomamuwabi.pdfIn PDF document text
    • http://hamdannepal.com/userfiles/file/79048183538.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/32411939299.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/gafosaxazavegarafajiralej.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9ba40fe0---pomedaxegelon.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/rusireregekiwalafenedaluf.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe2a32b5c2---31930169045.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/62914752164.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/23418912270.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_off0000b02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB02A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 10992 bytes
SHA-256: c50c406905154210205d582391e3e22a6b142bc10ab6b6038fc0d3d6baee8842
font_02_sfnt_off0000e1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 13132 bytes
SHA-256: 87d382d8aa861bc315cf29fe4f08ad3f774365c8f2eefc366d2fb7237d3ae7d4

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