Malicious PDF — malware analysis report

Static analysis result for SHA-256 c016579863d98f77…

MALICIOUS

PDF

91.2 KB Created: 2021-07-02 16:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 467ef6db805914b600777ef92fcf289e SHA-1: 1c81583277410d5c4b835fb6e5faecc2868106a3 SHA-256: c016579863d98f772ee694f324e30d2a1a62c797b7085f7a50044143e6cec760
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many hosted on compromised CMS platforms, which likely serve as lures or redirect to malicious content. The document body was unreadable, but the heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ketchas.ru/uplcv?utm_term=linkage+crossing+over+and+chromosome+mapping
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1df6f0ec49---kejopejademubajutot.pdf
    • https://heritagecambodiatravel.com/userfiles/file/35312540967.pdf
    • https://reitinguok.lt/userfiles/file/92657239321.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdf157016f---67583636161.pdf
    • http://peusch.lu/userfiles/files/26819921966.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/eeajr61mlae1pka4t9dnh85827/fuwawim.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607a78fa9bc63---17868630486.pdf
    • http://mispuntossaga.com/campannas/file/78645953177.pdf
    • http://greenld.com/userfiles/kijekeninopa.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a51c65d33baa3a60d4efbd933994a4a5/zezitaz.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/5bf9d714c4fd6e7a7aea9fca8bff5b07/rugoku.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a64201f20b8321be462c51941ccfb7f5/33003659718.pdf
    • http://phelieuviethung.vn/upload/files/68022030349.pdf
    • http://www.anclupnapoli.it/userfiles/file/pujobavalobim.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec680a7698---8423943351.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/o192nm8kaus3dijaa9ih96pocf/maxuzopomimaz.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/0fcb8fedeb34e2f41c376223194c110f/janujagobedakiweposisa.pdf
    • http://greatnice.club/updatefiles/file/ririwisoba.pdf
    • http://bhs-class1957.com/clients/35434/File/wiwofe.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a3026e0aad6---96067025960.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be28109492---38739268803.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607e03a0d2397---69420670178.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63870cde36---sovanexigobutibinukasap.pdf
    • https://aradovan.com/userfiles/file/1019550125.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_off0000fd11.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 16792 bytes
font_01_sfnt_off00011523.bin
7baa5194c9800feb19ee2cfc0e520be1ebe4618ce3a778ea0b4ceb1448d72113
pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 19000 bytes
font_02_sfnt_off0001464a.bin
3de616f84c34862f7b32a0e40b16580ec0bd860640d1ff0fedc6461d5d75e7c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1464A 10932 bytes