Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f99a86ecd046f…

MALICIOUS

PDF

106.2 KB Created: 2021-07-06 22:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b760419ac7ead696fdc4aa81f7a91cb SHA-1: c3bbe1da0b750d51b68b551bd487d4161aaefeae SHA-256: e48f99a86ecd046fe2cabb4c9d6447ad9f5d7b9cf163cdf665c9a181ee41343a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The presence of embedded URLs and the nature of the link farm indicate a likely spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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 http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bca1be61bc13671cd3a4249d4d9f316a/96871565480.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/50177319957.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079304ab892a---rojefafiviwejizunufos.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5f9bfdc27ad054a16569099e1936af78/26807800889.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/9dub4rl8ncj4qni17ucednhedv/42350132166.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/8a2e28b45396284df7d4accf7757e8d5/disamejafonozosomixazuli.pdf
    • http://princeverma.in/uploads/files/57911651089.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/4e02bfa70bdc388647f6bd57db3c4c7f/babewaweg.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/97832dfa70d62ef65e58fbf52e0b2d58/fiwesof.pdf
    • http://kengosushionlineorder.com/uploads/files/zurogotejen.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/7mp836lrrsqqsf6fuuqun6efd3/56865247674.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88c9ff0e25---zorudixedalagukufirole.pdf
    • http://tksvolga.ru/userfiles/file/bewiliz.pdf
    • http://dafelia.com/files/82324636495.pdf
    • https://gamaconsultores.cl/upload/file/famaweribov.pdf
    • https://ludifrance.fr/userfiles/file/13612430145.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/pisomunawesewirigezeb.pdf
    • http://www.stemcellhairclinic.com/files/files/wililifowawipiwudikis.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16076b12ecd015---16677869027.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d45c82a7---sonotadapibigizukidexezi.pdf
    • https://etcbt.com/userfiles/file/36611110125.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098527687d7e---zeramagorimefifulojonujef.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c437e44aba---57071294430.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b9d7fab5a7343b28454d11d3e3b62e3a/rudapejolufanajef.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pokemon+y+how+to+get+mewtwo
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001034f.bin
88146e6c6f13fec564d98853b8b655772b901248bf953b91b9c944a0991a211e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 9140 bytes
font_01_sfnt_off0001220d.bin
bd72e0016410dea6d6cb0b5da103bbe33e39c774b6adb192caacf4b69d72faa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 16412 bytes
font_02_sfnt_off000138b4.bin
2d68ec8f9e0d392b880412864adebe2fb9cc5e6eb12d32d95ea19d10a1b0ffc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x138B4 10280 bytes
font_03_sfnt_off00014fbe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBE 16792 bytes
font_04_sfnt_off000167d0.bin
fad049eaaa3fd6813908277889b7965cdff143dc0ed8a1ce95e15ed365be095c
pdf-font-stream PDF embedded font (sfnt) at offset 0x167D0 19332 bytes