Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a395f470a934125…

MALICIOUS

PDF

147.4 KB Created: 2021-06-30 10:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 303df30fc573a522acd59e5208b36504 SHA-1: 37195946ddf443699ec6094da437bfe9af870527 SHA-256: 0a395f470a934125d69d9aadf5da17048ea4fe310f22209e0ff3dce5056876bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to multiple distinct hosts, many of which are compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/13d0bed0e3fd921e083c2b005aaac94b/62457360482.pdf In PDF document text
    • http://www.alfapilates.pl/upload/file/rabimobigutuwukok.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/23113853896.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/buwobemuwid.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/8275511398.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/ralajoguzozo.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/meg120s71lrvmbo548hanvlg85/57117089592.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/durulepawateperajenepe.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/44627369513.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/2568439231.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/6m56l1sdqiventspjo6vivae33/74578962763.pdfIn PDF document text
    • https://dm288.com/slicice/file/pimesaxezadobosigaga.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/ritikona.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/700sb53626pau0icug48oe0p83/napawanovidepisi.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/bfd1dd52d4a1e5b37f079ea380454ee7/zatilage.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99933d1f15---67400415263.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16092461092187---62971669734.pdfIn PDF document text
    • http://iltorg.ru/upload/file/12635099811.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/an4pmadfscmrv0orv3dmg9rsd7/ligibikafesatesojovod.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad48c9b7d23---33162132185.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/fifenabukodesufipozodawo.pdfIn PDF document text
    • http://rts-3.ru/upload/files/83839577820.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210530080637.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/d55d276b8ad8f656892db3584c5332df/27652426537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=justice+league+full+movie+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF08 10840 bytes
SHA-256: 5c5400b1e001b533051986516ac87d82751a502a4f7bf3d6118f35c469d4dc57
font_01_sfnt_off0001f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7F3 18228 bytes
SHA-256: 037af42fec93f7c37465f962cfe199ef0f2fc52b71b7c35435a6e31d1db774b3
font_02_sfnt_off000227d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x227D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1