Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae6706849ea034c…

MALICIOUS

PDF

106.7 KB Created: 2021-09-01 18:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1cecee166c689ad9962afd649d710213 SHA-1: 450a629c9bdf262dc681a60a0f446243cab2aa15 SHA-256: fae6706849ea034c419897ebd51c83adeb71cc33a32bdd749f32fe8568bdec37
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://mobilesamara.com/img/files/file/zosofokuv.pdf In PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/bogagefapakewanemi.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d3273a87a7---wejufubusuwafululusoxur.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/buvugokafekukoxuje.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/142820080660d40ed37532d.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c2e2d62c0840403ea5558710b3ad9b3f/47883660783.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/18970054480.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/fozeguremujavobusib.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210617_CFEA564DB93B30D6.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127764cf0d21---zefuvadarorelagumuva.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/4fbvtedn23qejbcsg30u2l1le6/kebegixugorukazipebofe.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160fa5b9fdc9a9---10086077126.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/rekevidazejalusazito.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/vamuvurelida.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/subivekebojibodasujo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079d17d8b346---vufetolikaxibik.pdfIn PDF document text
    • http://hondaotohaiphong.vn/upload/files/vepajasidugonaputu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a26a2ec63e6---82572345511.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/tasabafojet.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ad3727404---41981360663.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/nuzoladamelodosemofid.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/4dasl13qi4k9com1bbbj8hhgs0/gaxeratapugegasuwidolo.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/rakigikukawedazi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s25uhf0u2659klfll7cpq80hq3/76902674508.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160ab104c5b2f5---guxixag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=southridge+abstract+and+titlePDF 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_off00013caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAF 17928 bytes
SHA-256: f472963b9581ea889101c442d9dbcc023c7d72220376582b98eb5214e60fcc8b
font_01_sfnt_off00016b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18391 10964 bytes
SHA-256: 2b68bf229ad9a98117f3f287673b62203d77fcb42e1a1d3b870792a1b69ca346