Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97abccdf93dff40…

MALICIOUS

PDF

75.7 KB Created: 2021-09-12 21:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7361c7d65d7dc0ce4f00f0e01cb9a08b SHA-1: 52656519eb4e030472bf3f30b20f38eeb12e6f8b SHA-256: d97abccdf93dff40a4270e4c04a28aac85c3db43a098bb27b6ca33fd6301bda4
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of multiple links to PDF files hosted on various domains indicates a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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 http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/takejokoseluluwo.pdf In PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/60979929092.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/zuvijigiwojuniwamanow.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/69467598313.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/573f0ef6127bb1d681a63d09e662c137/85339620742.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6e7b9401441f04c3273cb9793f9296b/14812314902.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/48314090895.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/kavepe.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/lowifezebuloduxa.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/rowukinadum.pdfIn PDF document text
    • https://kopari.hu/files/file/lifejujuritupiwu.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/78329503769.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/16125174997.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/lujuzufopejaledavasap.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210908070329.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135da04db7d8---keguverivubimokaronevin.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b52da5816---lugamud.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/64793184069.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/fafisizepurowegaz.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/foxivawidesubinala.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/17166315540.pdfIn PDF document text
    • http://artdental.hu/editor_up/61787970270.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/xaruwojumumabujad.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/jodutasolomibepopaw.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/saxoroxebugekumuwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=watch+la+la+land+full+movie+online+free+with+english+subtitlesPDF 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_off0000be5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD671 11308 bytes
SHA-256: ff9f117204eda8324c26d5746598e839a625be601aeeacd9078d31c9cc3f4b57
font_02_sfnt_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 17724 bytes
SHA-256: 616da993a676a4bcc61c2c19e11bc70981e3c9d7d09d5ddf291a6b9a0a6b0b29