Malicious PDF — malware analysis report

Static analysis result for SHA-256 e336532b6970d37f…

MALICIOUS

PDF

79.3 KB Created: 2021-07-17 00:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 577a8ff1139be93d1f32daab57626da9 SHA-1: b1289d589ec6c6e64a660945fec724e41e9347a6 SHA-256: e336532b6970d37f2b552918d28e9dc3d3c1aa1536fef29bfac1c45cac0e7a9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac619e81dd3---81313460016.pdf In PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805bf540d10---27575047352.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/94323199966.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v9njqe8bqhea6gi3btmlcbr066/21883788639.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/2aajml8tkf7orkk4jduhijsd62/bipekabovikinagevukom.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/0alsm3h3uikca3gnvfkslhj91o/86577194745.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/xubimegigitef.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/fetojomolifa.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/4247573708.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/tefuvizakuzidofufakidanig.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-7-3/20210703104351192507.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef64a05823---gasadigapo.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/82026017107.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/mawibumekegi.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/zubinejeweradusu.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/jirukiji.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/88514037715.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e991e47ba4---12059251869.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/limanixekel.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/80258551170.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/tirufu.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/gosuxuxexesodewun.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/gipizegitisuvedotijazakon.pdfIn PDF document text
    • http://eths1967.org/clients/6/6b/6b000f7c2bca5b3a89f93fde6b54c5e6/File/5464851742.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/jizevowevixuxafuxuxiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+pronounce+rarelyPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1F 10396 bytes
SHA-256: b48148aba92bed1c5bec99d092ffc3b910af87242e1ffaeac7fdcd1d607504b8
font_01_sfnt_off0000d4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D0 6116 bytes
SHA-256: be2d8cc0c1c668fbcba7ce5d5a0b2e348bf132cf2ca3963a7062e75fc5756d66
font_02_sfnt_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 17352 bytes
SHA-256: 7dd6849c43ed07a9d842cacdcea5646196be0a0d4d4298b5c604beffef3de48f
font_03_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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