Malicious PDF — malware analysis report

Static analysis result for SHA-256 75467f19118b799f…

MALICIOUS

PDF

87.3 KB Created: 2021-08-17 23:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 005123e6ead36d266acdd6e4eadbcaca SHA-1: acd2de21ad729f109fa3540f0b759d3ca8080b4f SHA-256: 75467f19118b799f8f4c9277a413908a5275cc6f6f02d8f74952669c0b14bdd8
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with several heuristics indicating a link farm hosted on potentially compromised or disposable domains. The presence of a 'download button' heuristic suggests a lure to trick users into downloading further malicious content. While no scripts were directly extracted, the ML classifier strongly indicates malicious intent, likely related to distributing further payloads via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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://dlikefulproductions.com/clients/875850/File/16151802141.pdf In PDF document text
    • https://dakhoathienhoa.net/images/files/26004398020.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jepir.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/bewigamo.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/selurumefixafuwuzosusasi.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/51600010165.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/44350627206.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/dudulubopizawibuwosena.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/vetug.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/92029964221.pdfIn PDF document text
    • http://allycatering.com/userfiles/70572786635.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/62201150270.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210619060749.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/zijupivomezubi.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/isamlns7u32qsdehdi2m8pulqm/golikavopaf.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/kulisodiduronirenidosurit.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/12171471473.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/wewerumiliga.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/mijeneduxujira.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/6gja0kg6fi9fll2sp8gejda6k7/foloxadegitulapum.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/1c70a6900836fa9524c138706a8024af/82764645384.pdfIn PDF document text
    • http://schs1968.com/clients/861610/File/85185508981.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/85602014057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=fx+file+manager+pro+mod+apkPDF 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_off0000eb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB20 19580 bytes
SHA-256: b7d160b4acf69bb7a689e56649c852a1bb3dd22c51ef9ae9da82d58d9c97f08d
font_01_sfnt_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 10744 bytes
SHA-256: 882df7fb9b684a8f23764c713c871f35660c9450df6aea9ed4db788ff948978e

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