Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ee1fc98078f7a…

MALICIOUS

PDF

85.4 KB Created: 2021-07-04 23:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23c996e3d8e383cd004273aec73c74dd SHA-1: 128e3d239a642edef632b5caf3d0818fce9d1417 SHA-256: 700ee1fc98078f7a04828dd9002fe5499b88524f84a96af1cb9ab7c50f12b67b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://philabc.ru/uplcv?utm_term=afk+arena+secrets+of+the+forest
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090f0b44ab29---nigaxajexewibumiriziwuwok.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/bb00adf7bc981dc18e45646e09a99d03/lurajijeniravubaxazor.pdf
    • http://agataklimowska.pl/userfiles/file/tatol.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ao17es2f61p9tmalicbbjo3b03/64636628027.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086e44c9a719---79815977625.pdf
    • https://study4student.com/cache/fck_files/file/13031304058.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e7c0083ef---98953952034.pdf
    • http://usmleworkout.com/files/file/pevewefonixakej.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/4ce9e55d92330d50b970a221dfd477aa/55601142405.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/h0c69hoocjthls0q441vbupb33/4413476004.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa785dbb78---depasifirunupa.pdf
    • https://satybharat.com/ci/userfiles/files/38369999197.pdf
    • http://uralinteh.com/uploads/files/54121675220.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a962a08ab6---gadobogewo.pdf
    • http://aweibel.com/Photo/file/fuzonumovid.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/26515c0e82ab0bb704c1311f1ed83655/jezanu.pdf
    • https://bkht.vn/userfiles/file/33179616554.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fecc33cd61---83308603961.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/uabh4132th3abc5kj4n9gdmvi4/punokobamodorozovu.pdf
    • https://cardion.dk/gfx/fckimages/file/6610049771.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c42b63722f---37958009842.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/6703222e7465d3b1baa018836d064922/11841772786.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d0d968021---98751914204.pdf
    • https://a2designbg.com/userfiles/file/80151254864.pdf
    • https://satuldelut.ro/ckfinder/userfiles/files/40788159765.pdf
    • https://cuisinescartier.ca/upload/editor/file/xuxene.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfa.bin
e93a193b231b7ea7baa946719a4c43feaf214978f81605b1177b14001f716a8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 17140 bytes
font_01_sfnt_off000118c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 16792 bytes
font_02_sfnt_off000130df.bin
6dd807180d101627a42dfa5f8d8adff6cdac172fe2557cb2d86ae013f759d474
pdf-font-stream PDF embedded font (sfnt) at offset 0x130DF 10368 bytes