Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09f4368972c7cb0…

MALICIOUS

PDF

85.6 KB Created: 2021-07-07 07:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c88557112f209094200bc6ff13de211 SHA-1: e33a621f9a2541fd26ff13b29bbc5a7e924c8f1d SHA-256: a09f4368972c7cb00f4382630669472a35a44875e3814d039f4f989eaeb0383d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm, with multiple URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. The presence of embedded JavaScript, flagged by heuristics, further suggests an attempt to execute malicious code or facilitate redirection. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • 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 https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/c49tkqvlupqlpre4viipq1b86f/rovetuwekujoxa.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/5eec7f5771a89b82c365344a48cbfcd0/69800597572.pdf
    • https://agrilaui.com/userfiles/file/31157441221.pdf
    • https://aimhc.com/userfiles/file/98775157879.pdf
    • http://remaining-mc.de/userfiles/file/masemojewek.pdf
    • https://internationalmedia.com/userfiles/file/gidozelasakobasefofob.pdf
    • http://accronline.com/userfiles/file/64004028497.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/d9c36f54948ffafafe2ef3425a2a699f/13451026421.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852f8479aa5---digepevabuza.pdf
    • https://torgradio.ru/new/files/file/wapilopabi.pdf
    • http://oilandgaswork.com/userfiles/file/robakemelekodejokafikako.pdf
    • http://agcslohian.com/userfiles/file/40280192492.pdf
    • http://bodegaadrover.com/userfiles//imagenes/nelojolenufedudabibo.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/6253068828.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac339b46154---fudowefumijubamaxa.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/pqsl9f2bhpq30452ie4bkueklp/girutefesobe.pdf
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/ratujilidikumexefi.pdf
    • http://kurumakaitori-one.com/js/upload/files/67246440158.pdf
    • https://ludifrance.fr/userfiles/file/gurazogezajijebaravi.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/75595940145.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23008222657.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/ca94ee1e7f1d24a767b790301a013c1e/batekobabivilewedanaza.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=word+finding+goal+bank
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed76.bin
d5f024a99b1880db6b1f7943fc1f8701fd7c46fc592f71af4ef573efa0af2945
pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 16824 bytes
font_01_sfnt_off000118c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C5 16792 bytes
font_02_sfnt_off000130dc.bin
0bf42e735065d2fa2ce48a098166cabee60093eba39f624e82e656420086f831
pdf-font-stream PDF embedded font (sfnt) at offset 0x130DC 10356 bytes