Malicious PDF — malware analysis report

Static analysis result for SHA-256 865055cde178d832…

MALICIOUS

PDF

99.7 KB Created: 2021-09-06 10:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eacada1d2efea11ee64db7eb8f24ff5e SHA-1: 23efe1868797c0871d0136c24732ce6442b839f8 SHA-256: 865055cde178d832d7bbf215e795482a938621132a535de5ad68cac968c8941b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farms pointing to compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://chcial.ru/uplcv?utm_term=astronomia+nova+pdf+download PDF link annotation
    • https://losaltos.com/wysiwygfiles/file/nabipo.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/moxijanuriborokojep.pdfIn PDF document text
    • http://cf-solutions.org/app/webroot/fckeditor/editor/filemanager/connectors/php/imgmedia/kakelilozob.pdfIn PDF document text
    • http://goodmix-psc.com/userfiles/files/82984119986.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/8518332888.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0e968fed205b67c74cc2951218cc841d/kuxomemijasat.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/25913035009.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/wejivodagarafe.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/subumataxakuju.pdfIn PDF document text
    • http://unseretochter.com/images/file/xejututenowuzoxama.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/3f1e5d5d21e90ea6b73bb36df3bb1880/11608108145.pdfIn PDF document text
    • https://superchills.com/userfiles/file/koganarufaber.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/jabuninifos.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a8212453ff3---mutavapukobebiriwevup.pdfIn PDF document text
    • http://i-dron.cz/data/file/18022781219.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/201559faac5d92a4a011b32ffc2f8ef2/wegikixesejoge.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9ca702313---84135358761.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e26b6962dd---47334327446.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912d1735ce1---19228032265.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612360cde87a9---80073668219.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/9554ea4b0148c06cbf3d12e9539fd4ba/32344051853.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/kitun.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/27471198726.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/12175539403.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A31 20752 bytes
SHA-256: 1bc59803d3d85f6b8184d63c4e4627439dd3788c543c56850acea28ff3d08691
font_01_sfnt_off0001506e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1506E 10660 bytes
SHA-256: 5d59136c5b6362862dc9197965ff560341fd963aa60015e137df9a85f2ca2c9c
font_02_sfnt_off000168e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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