Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5888fb26768bebe…

MALICIOUS

PDF

92.5 KB Created: 2021-07-01 23:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df317a3e929e179525d4e1e7af74e9c9 SHA-1: cca3cfb8c40dc210eadb1d45f952cd0cb7c7e671 SHA-256: e5888fb26768bebe1c803ea54b4da188c32b7b141e3fa981ef7c52c3bfd0f052
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised WordPress sites hosting PDF files. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/digvjftbb4r63vj1jclccaubf1/vodikumegoragepapu.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083811b03bfe---boberarejaxokoxibawavilo.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dafa163fa69---27940145816.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2226ec7a5f---vunosoluvo.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/5b533d19efd16233a96277fa552418e8/37923835659.pdf
    • https://dolmalatrek.com/userfiles/file/65961698933.pdf
    • http://applexin.com/ttpsea/files/file/xokududumejurufol.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f5be31d7---79116884830.pdf
    • http://yfatc.com/userfiles/file/mopilemedokipibufagufen.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8f95fe15d2a6ad57c64bb268d02295f5/ximepadegavopexoxolepov.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b04f9a3d9db---91382222874.pdf
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/92448717175.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c322003a163---20631753014.pdf
    • http://abovomedia.hu/_user/file/35814462958.pdf
    • http://sankofalectureseries.com/clients/a/ae/ae3037074ff26ae8502dacd236f4ced8/File/97914131836.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/jn8rh4h42pidn4dknt5hj233p6/9343286256.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/1612c0e7bbfb299a55da6642d5d88691/96016130366.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6540c9ae8---sabogakepirokavemi.pdf
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/wumorazujupa.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ad6e5b08e23c30d2c77370bc4952c648/69423436897.pdf
    • http://joyearland.com/ckfinder/userfiles/files/xijodaxa.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076387ff109c---fizabudixipes.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/c900993a252b7a0e63f5c5b2c563b871/relelarowed.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b2601e514---94027086624.pdf
    • http://kondicionery-lubertsy.ru/upload_picture/file/kefufomizixokalidezoruvi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+access+dark+web+from+android
    • 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_off000104e3.bin
30219edb4ace73061f436eced18acd149d488d1c48f9bbbadf04e8c14356edf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E3 10900 bytes
font_01_sfnt_off00011e25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E25 16792 bytes
font_02_sfnt_off00013637.bin
902ea34d2d6045c552be81ded0bb265611d35d50f4d9b6998d32975537c18bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13637 17632 bytes