Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcecad87d7c23fa…

MALICIOUS

PDF

87.0 KB Created: 2021-08-10 10:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5c5070bb4d64441af454bdc9130d311b SHA-1: d2918daa59199d26489801025a1bb93493224a3f SHA-256: 1fcecad87d7c23faee1f4e188c46893fa79e534429b8f0ec0cd299fe7c887dc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the presence of numerous URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://chcial.ru/uplcv?utm_term=how+to+generate+inventory+report+in+tally PDF link annotation
    • http://copy2d.com/ftp/image/file/kaluwobodip.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/vijiwofata.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/0fb7d0bc9f3dfa7b53c8483114936a1e/68053546519.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/fedidabokerubovofopotole.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f441707ac3---gomumivasubuta.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/70541685358.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3rh4nmu520ac7b76kl77nvk7r4/20804706295.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/jijibuxutoluxe.pdfIn PDF document text
    • http://hanifeugur.com/image/files/80365309210.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/9d30a460ee59f4824d394517f8560f2d/56684599324.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d4b8d44c---41222131439.pdfIn PDF document text
    • http://ruresept.ru/files/file/55977949570.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/2972481818.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/rovag.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/44799171169.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/zomezoxosemipiruv.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/36395490037.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/mivutor.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2f10fbf8fdea2d0a7345fc8a0cd78c1e/pajavelunolodo.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/17952494726.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf0bebd21---lomemakukedadara.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/34be86079986f22bd3aaa15639cc6842/29789601606.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/90479738410.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_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A21 16752 bytes
SHA-256: 33e2c8deb8d9c9d6fad3fa24299713235521ac2cdaa6c2562d12f303d64a480a
font_02_sfnt_off0001351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 10516 bytes
SHA-256: edfaf6fb3e1a734e572358216525f71703741fcb9bc906ae045a368410d3d594

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