Malicious PDF — malware analysis report

Static analysis result for SHA-256 94caa291b629295c…

MALICIOUS

PDF

91.5 KB Created: 2021-07-19 21:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65705bbb23cfe3fb86e5b45d90ca2e10 SHA-1: 4bddd24f7e3bb2433c65ba8d5411966b002cc646 SHA-256: 94caa291b629295c824e46e5026ce46aa48ce1dbc242c5fbbd47d68beaf75a62
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, forming a link farm. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to untrusted content.

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 http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609a41bf4094c---rerinavosolef.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d92f881a246d682aa5de424a9c5f75d2/zewimidutotedar.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed0fa3188e---fipajasodubozanekorak.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a81d5d4f68---revigi.pdf
    • https://fertilizerproductionprocess.com/d/files/30029887361.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c669a407a2e33c238fe71b0b49a12507/94055968971.pdf
    • http://cartopack.com/Images/file/65773913556.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kv9vaso369633fnvn54eu1mpi1/24998783101.pdf
    • https://mwasafat.com/uploads/files/jilefufejajimetetokiweto.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/lufixatiwakatorizozunelod.pdf
    • http://nhactheducthammy.com/upload/files/gopetorageg.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a112d6018---10451210959.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607579d975576---95768019393.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb838a1ee---80463497438.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160926156a6ae0---50470211302.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/20287062196.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607611e4c95dd---ladubatatovotewavo.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e5f8ceb3075a278612f0aafbb4f588cb/dujubokavijobesiritutuz.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1341581433---90239102379.pdf
    • http://trans-serwis.com/userfiles/file/netiferipufirexenek.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c85262cdbfa9120af96654c8df387f89/7800984060.pdf
    • http://bet-balance.com/userfiles/file/tuxawuluvajevomevetazulaf.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c01b71e81d7---14117453787.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f44fde10c3---godimaribizanuteno.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+say+shut+up+in+spanish
    • 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_off000101e8.bin
9c1acd01cf289ba6382945d5dffaadd11cf1ac71144e215547b57de870a0ce3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 10364 bytes
font_01_sfnt_off0001194f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1194F 16792 bytes
font_02_sfnt_off00013161.bin
b7b24342560259850115ffb5ccff96d8069a7e52b79da084436db8ab919ff409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13161 18672 bytes

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