Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32d57fc62a8dc51…

MALICIOUS

PDF

68.9 KB Created: 2021-10-04 00:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2b50ddcdf5ee582786feca5fddb4d455 SHA-1: 826507749679851fabe65536cbc6a01942be3c93 SHA-256: f32d57fc62a8dc51f18e0067963121533f89ded227d63bf1646ee27fb85d976e
176 Risk Score

Malware Insights

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

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised WordPress upload directories, suggesting a tactic to host and distribute further malicious content. The document's structure and embedded links strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • 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 68 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://drafthe.ru/uplcv?utm_term=clean+logo+reveal+after+effects+free PDF link annotation
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161559a1c6dfff---58761795052.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c2927c247---kerozamojomenamov.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1631615256_1.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/39366499091.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/79786102513.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/49522896189.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/zuxegamozipol.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/77054241987.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/lefuwirejexojiwozopujozes.pdfIn PDF document text
    • https://n-vv.dk/userfiles/file/40010020461.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/41307047853.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/99504238139.pdfIn PDF document text
    • http://banquat.com/userfiles/files/jotadorevawefobid.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/36478809857.pdfIn PDF document text
    • http://bresky.cz/res/file/44345020836.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/31438740712.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153f21a05bd2---28417948593.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/40183906904.pdfIn PDF document text
    • https://najemwroclaw.com/userfiles/file/walikezonimaxuxid.pdfIn PDF document text
    • http://potlista.com/file/files/95897119214.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/46621818500.pdfIn PDF document text
    • http://lagrupacio.cat/file/puxadovetogodarod.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/45840384889.pdfIn PDF document text
    • http://webursitet.org/Files/file/zijed.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_off0000af8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79E 14424 bytes
SHA-256: 66dd4442d43623a80c2e9d20ffcc5b865683e406d55a566e51a5afb70e1aef08
font_02_sfnt_off0000ebc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 10516 bytes
SHA-256: dee71a54135af7ea16e6242c67200f1b8294aedee2c4dcdbf65052144d0446f4

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