Malicious PDF — malware analysis report

Static analysis result for SHA-256 e449624148ab2f8d…

MALICIOUS

PDF

83.0 KB Created: 2021-09-05 05:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d3b77638cd821fe294d6218e0fd68e7b SHA-1: 1b289f6973618228569a337189afee335c7dcf0e SHA-256: e449624148ab2f8d5528125d51f3e630545fc68e1540c63d86e6dc3e12b659ea
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's designed to lead the user to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://garglob.ru/uplcv?utm_term=wh+questions+worksheet+pdf PDF link annotation
    • https://feltshoe.com/userfiles/file/22726677441.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c44d42d3e---pikuku.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b23c6acf49e---66617504750.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/rumufilegaruz.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f05ecc48---mavipupigorigowoli.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/241223a4a17e2d318f8446bde0bf8042/54648599536.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/51526431090.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b490865d9144159470812f4915493860/42542723609.pdfIn PDF document text
    • https://internationallanguagenavigators.com/media/mojezesukevisilufonavi.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6aa08d11c---40353588498.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/bujezepanoxemukame.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/21669147482.pdfIn PDF document text
    • http://afro-safari.com/upload/files/14509194003.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/63701083875.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/fogipejidenezapopixo.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/79690640507.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/gavozilazoxopugi.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/99971894907.pdfIn PDF document text
    • https://0900107678.com/upload/file/losufirutupad.pdfIn PDF document text
    • https://codecs.roimages/file/taxamizudisanotojafaveve.pdfIn PDF document text
    • http://www.heksan.com.pl/file/nujutuzelofosuvozuz.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/tarig.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/87d92f954cc513c04859357aa72e1a9d/gezebakujofuludiwi.pdfIn PDF document text
    • 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_off0000dd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7A 10804 bytes
SHA-256: 35cd0a5606a534f4a29e0b6e4483d3cb42c17ab1e69cfe59a3efb753c08940f0
font_01_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 18860 bytes
SHA-256: 5c23a536cfa6d0a76532e4789d5c8201878f62134d1eefea0d04e99744519dc1
font_02_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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