Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89a472030f7d12e…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 06:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dfd95edf4fb95521400d938d5843aba0 SHA-1: c746742699665a1b731a6d325fdb069975433675 SHA-256: b89a472030f7d12e6649713f452ecd4aa1aca45c0d8f5f762168777b62653a19
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress upload directories or disposable domains, indicating a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://huntic.ru/uplcv?utm_term=impact+of+globalization+in+tanzania+pdf PDF link annotation
    • https://augsburger-dartliga.de/uploads/file/59944250701.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/gupuzunegebose.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/06b5fb8c45bf3f17373b3eb4bf532b19/xesazovafijewiwoxurigumo.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161234c568eab3---bibesi.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8968c4868---zemuwisuritewugadimi.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b00968b7147---saferuwanu.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/zozep.pdfIn PDF document text
    • http://generaldistco.com/images/file/98526686486.pdfIn PDF document text
    • https://ekransamara.ru/files/xekigugibifu.pdfIn PDF document text
    • https://hirurgija.me//files/7231876480.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091aa9a3ef7e---97636951632.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/gkb25c7vf75g3cutlp54e99gk3/95714101193.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/hcua339jfkomvqpsssparcnqvr/31780225338.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/gumivujotegunimoxijosidi.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882c1e3d1f8---80386675421.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16080964978e95---pivazenululevalogofubib.pdfIn PDF document text
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/98587848476.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/25964165744.pdfIn PDF document text
    • http://2rent.gr/userfiles/file/77876688234.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/nebexotagirasisekunevo.pdfIn PDF document text
    • http://sooclose.eu/upload/File/76885285067.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/23924250038.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/i6nl98ji1629n0u4rhk9rnv9oo/dekosites.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/59326478630.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/rarun.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_off0000bdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C5 16312 bytes
SHA-256: 9905d7341a4a85124f3642a82e1e57f9f59f6e0e969a5c846d3c43945ca9ac11
font_02_sfnt_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 10712 bytes
SHA-256: b6ea987ef4646336ae392d550b8ece5f0f6e4de3411b509e3eb6f84cfd906142