Malicious PDF — malware analysis report

Static analysis result for SHA-256 d782f0b9beb6c96a…

MALICIOUS

PDF

76.9 KB Created: 2021-08-24 14:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4770592e9a7a449e413baeded822bd66 SHA-1: 6e40890502d3249551a475b17fc2dabc1ee69bc0 SHA-256: d782f0b9beb6c96aeb15b5aa049fcf24d8e5cdbaf722e92d57ded1e81e09cde4
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The presence of 'utm_term=luck patcher pro' in one URL suggests a potential lure for software cracking or piracy, often a vector for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://aldara-latinoamerica.com/userfiles/file/73492459062.pdf In PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/jamafimal.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/66559490923.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/7713976056.pdfIn PDF document text
    • http://heizler.hu/files/file/32531550744.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/bonuxupodemaben.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/sowewibetanuberevujoj.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/899d70cc81b748b5bb06667695b85de9/59819065207.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/4b2b5rh937noe4mdtb4arkfd5h/54349122749.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/31816474446.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/95e956be65511e8f028bd7aa090e99b5/teril.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/gonotubemilirowapori.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e17c7f2b61---81631426677.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/ninasigokizolalokolaza.pdfIn PDF document text
    • http://redactron.com/userfiles/file/3789506025.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca03669066---41348460711.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/u2uk0677aij8b2756pnmjccce6/14593173172.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/voie4nsc9cvu9g6aies5fabtar/selewijubemejexisisolu.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/8udq8b3fpmjre2k2ireg33o190/zeniwanafuxudef.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/86145813310.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968b7956965---mufumol.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609670afa7675---58313199003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=luck+patcher+proPDF link annotation
    • 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_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 10208 bytes
SHA-256: f1350813bb6ca97372888041e52873332059fbb559dcb58e27d2c3f5cb5ca7fa
font_01_sfnt_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 16748 bytes
SHA-256: 089d21a9ca4c478111520ba96e99e2ac45bf97eaf6e790648b1e061e684e67e2
font_02_sfnt_off00010b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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