Malicious PDF — malware analysis report

Static analysis result for SHA-256 640217eda5dd28a2…

MALICIOUS

PDF

89.0 KB Created: 2021-08-11 11:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9a4182f1cb87ad30764c33a082579cb9 SHA-1: de3af5785d6279092b0c677d5b096371c74a5d32 SHA-256: 640217eda5dd28a2b81c978a338558bd3aa6152347bbb176dc6c6439c10d161b
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://minegociomiweb.com/userfiles/file/80977770650.pdf In PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a286b09d617---kagipufogolufuniju.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/oqa1dv4rmtu0ga7klje8nhe193/12596738985.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/64223057179.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/nemikalove.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/99449198787.pdfIn PDF document text
    • http://chsjackets75.com/clients/a/ae/ae1e0d6431e3080ad3d3eb1024a27f31/File/11180902662.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9aff085d6---dujuz.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/vigojupavojominefexip.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/39837410729.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/8429575109.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/58756736218.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/7crafmvlqtc5v35gcemh8f2gfq/57368484761.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095b560b9b69---wigabit.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76bd28e9ea---38863638774.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zepuzumejetagatukika.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2da22f648bd6667425e8eef28952de9b/24091216045.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1beb842782---pizibivukimadotowax.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/58047282715.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/743e19fc148207d887d4d163882b5c3c/xewanerevuzi.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/e63fk8oe87j4afqn1ualp7aaml/gowafaluribefavoxisor.pdfIn PDF document text
    • http://446888.top/userfiles/file/95099171117.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/taborajibodigasonixoxomud.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/zozalor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+day+trade+for+a+living+book+beginner%27s+guidePDF 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_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 16932 bytes
SHA-256: bc31251a9d7fe8c9c4a9bf6ab49bf43df48f33a2c5c8ce234f483df59d059e3e
font_02_sfnt_off00013af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF5 11152 bytes
SHA-256: 0a4680d278ce6c096b7eec74d403539fd04674baff0f039ba2613f2152f99838