Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb329bff4b5620b…

MALICIOUS

PDF

114.2 KB Created: 2021-06-30 01:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9084c173486503e8f520843d54fbafcf SHA-1: e40dd07e0da48accd3ce26e3fefdc83430aa5e2c SHA-256: ebb329bff4b5620b8c7c7e02ea947aa032b240259fa2088398f5cb0a41e8d15b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://queure.ru/uplcv?utm_term=164+road+traffic+act PDF link annotation
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea8b0a6831---24134412890.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/lajogexuxejumawolovezuju.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5u0albr7fsc91ugh712aqr862o/84259737156.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6e46d18c2bec758e2a1374338e600b25/73017878411.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/winatadasab.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9ph0irkbceutlsfo67subh4mh4/gakowebudorigabeparatolik.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/78dfafe0128f228ed186ae2729c35a17/rodera.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/nuvunevutujamebezitogo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e029e4995---negutojawezopamusatesu.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3a8184cf3896ffba8075075532fd85f0/rixafodopomapo.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/madazekon.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/96442024041.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd09b97b13---mumutudurixuvisofuzo.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/34971681824.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/samerelavuxisadupisewiroj.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/dda5a998a4c89b239dc58d92cb08efb9/kowawegaxupevu.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160949516b904e---jefojuminaf.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/466059c4ef795cf1d05a17d4cd59cc50/felamujigiba.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/ziwunawapujomiwasimof.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607416b1207d2---rusuralizubuvuwigomur.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bbbe34468---74543035204.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/42733437536.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/ramaxilagajirag.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf1166c48---pekowojexag.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_off00015e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17648 10220 bytes
SHA-256: 15ca08bd617345782e59a4ac14bf64eb8fff1279a000bd359d8ff60c3e575a47
font_02_sfnt_off00018d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D58 17268 bytes
SHA-256: 04b37c43f10c414243deaa1ed4e9cb4d45fdcccc24f1c1c127cc11489d92349f

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