Malicious PDF — malware analysis report

Static analysis result for SHA-256 006ff770a9d74a4d…

MALICIOUS

PDF

69.0 KB Created: 2021-09-29 01:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8f0c56e4e7f4c7010cd81d0aa92f9a7d SHA-1: f614c6710248b40bdce1b06d6caf6b6f480d41ea SHA-256: 006ff770a9d74a4d5c5a32343ecef4e315a431cad22095b93d1002b8822b7bec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=mame+android+tv PDF link annotation
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143db6a931be---52462083384.pdfIn PDF document text
    • http://airfa.it/userfiles/file/pukalejirali.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140582385b21---61091025629.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ceadd47beb11bd66a7793f6402b87089/bixunevel.pdfIn PDF document text
    • http://banquat.com/userfiles/files/49206622606.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1614ffde981908---dolupuvopik.pdfIn PDF document text
    • https://mmszke.hu/files/file/70495582304.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/57401548933.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/90455734894.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/jakuj.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/davupuzijexabobi.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/wufosazezodusare.pdfIn PDF document text
    • https://eventaipei.com/upload/files/98238140025.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/deweburozavudis.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1ptm6l52lr22n3mt8pq87t7kj1/zewalipebuletaxupina.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/pinifezexomuz.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-12/20210912011519103697.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/6622891104.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/89894460670.pdfIn PDF document text
    • http://cutskytools.com/d/files/73749291394.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/12429018881.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/kegelunoxunutesanexa.pdfIn PDF document text
    • https://xcheck.vn/uploads/userfiles/file/97220016093.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614ece6771a0e---91430354616.pdfIn PDF document text
    • http://halanmilk.com/upload/files/vesamazalifikoke.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_off0000b142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB142 15328 bytes
SHA-256: df72d56bd7d8ae5546adbedf995d9714d5609d21c6326fc740efaa4df2396297
font_01_sfnt_off0000d78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78C 10252 bytes
SHA-256: ebbc3d9325dd5eb570a77e53772fc98468ef5bf4ab05b86da135a05225959e1f
font_02_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1