Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad906764805beb22…

MALICIOUS

PDF

88.0 KB Created: 2021-09-18 21:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 531179fd0d752bb40fb15c4f0019553c SHA-1: 6555940e4e1b5053a2d0c6fd704d82c2c574373b SHA-256: ad906764805beb22d5ee799f03c78a0f8dff4f403abe462b063808f7769b52fe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one that appears to be a lure for 'dream league apk mod'. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or download of a malicious payload, while the document body's structure suggests it's designed to obscure malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ty-universe.com/image/files/20210905_224604.pdf In PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/wamamekem.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/xevixukovojivovenij.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/vevabu.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/wufokobomibimofabak.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/vojatuxasotutamutigux.pdfIn PDF document text
    • https://maisonforville.be/documents/file/76772565865.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/21109342031.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/telujukiv.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///kanukejomu.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/vodonezuwixazipisix.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ca87c9c1f---42743364228.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/34281778839.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/41151706410.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/47201800253.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/38190348728.pdfIn PDF document text
    • http://canadianrockies.info/files/file/dopaganofanepefonibaji.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202109160453263165.pdfIn PDF document text
    • http://rayanchem.com/d/files/29583368595.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/xekametigopebokexupuvatib.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/2449521267.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/68884323587.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/20242858300.pdfIn PDF document text
    • http://davobio.com/upload/files/89841811296.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/regepokesasap.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/sokugej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dream+league+apk+mod+2020PDF 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_off0000f4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 10708 bytes
SHA-256: 0f6aa8b247525615ae5651643c88893514a01cb8fe7dd2a93aee1627d56f39ca
font_02_sfnt_off00012540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12540 17428 bytes
SHA-256: 90b43427f35224670b94e7853fe74906a4e335f7c5a9a2d604b3e67bf4765653