Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d30866f4081ffe…

MALICIOUS

PDF

82.3 KB Created: 2021-07-09 06:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74187230a79134b7a23b4f90021280f1 SHA-1: be0ef31d10591010c7074f1ad4bf4bc8027ae508 SHA-256: e9d30866f4081ffebe37085fac38020d2e2f2c800725cd1ec105c19c61367595
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/7ac3f00ea023381688f2426f14564905/87407802501.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/u00ev6vaeajf04jcq7a0fhmtf5/nenof.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/0a07e7df8e50d6b8ad31e079f06295f8/gipovimeraxusepu.pdf
    • http://emmanuelmissionarybaptist.com/clients/74938/File/76751000418.pdf
    • http://africa-emergence2019.com/userfiles/file/kinabogokepazulewofapiruj.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070e8f395252---surewisuwomiruredaseleda.pdf
    • http://fiumevivo.it/userfiles/files/47533478399.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6vfv3v50rcldhtu2kcq6apoc4/10196706738.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/q4s8fpu165d68hh80lgseeh0f1/15227321711.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c66039f7299ab625c80e473628ed98d1/93451077059.pdf
    • https://sanxuattrucauthangkinh.com/Images_upload/files/69974273413.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qvkh4t6qm61i8i9gelrdhouuos/51026235536.pdf
    • http://hayatteknoloji.com/webimage/file/xiruwor.pdf
    • https://silverwayshipping.com/userfiles/file/tukerekarotudawa.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/36656604503.pdf
    • https://ebooksweb.net/files/file/piwotuxajazodurijaxu.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608768a441cc5---33958389621.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/a9f3952cb33c0390688a898efc7a21ba/zanowaxopiwutar.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/0c16581b1df90c290d612cb0057b5c7c/jiraxalevorijorizudi.pdf
    • https://deltarents.com/upload/ckfinder/files/bavixaruwakejiguvizejiza.pdf
    • http://slanfusa.org/clients/47225/File/jefoziv.pdf
    • http://jullien38.com/ressource/site-image/files/lokolewuwunopokopi.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c2ad1632---24022828195.pdf
    • http://ffarchitettura.it/userfiles/files/tokuwozupuwunofutubejob.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/nm4e53li6runjmbdcamm61r9s3/woxebiwaterobetototuw.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b5363918047---18679056326.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=similies+for+like
    • 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_off0000dde8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE8 16792 bytes
font_01_sfnt_off0000f5ff.bin
e1c21d8424c1b177300d862c7926071d8115e8d9549cd1478ab2b34c4b48ef16
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 10180 bytes
font_02_sfnt_off00010cb7.bin
b864fb085c962dcbed60e565215e19fb5e50177c9e76aa32749e6656b6ac0d82
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 18292 bytes