Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b72f28318e6901f…

MALICIOUS

PDF

75.9 KB Created: 2021-09-07 03:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2d372c66d1ad1f9628677e6d8876fd01 SHA-1: 22ab6236e3dceaac3fb78ad1aefa190ecda2e430 SHA-256: 2b72f28318e6901f84e2c9f64a6c277368538eee34c46e8273c51defda97a4d6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised WordPress upload directories or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm. The embedded JavaScript likely facilitates the redirection to these malicious or compromised sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://akanaymatbaa.com/calisma2/files/uploads/rarofilumamedigexog.pdf In PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/pavodadavevunu.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cbiuujegnf83hvp60a4018cq01/derodemenutitiwanalotuzi.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/93483336391.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/vogarorov.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/15386721146.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/kv893n5or127mrddl73lmhs7gr/51815627891.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/lesenuk.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210906173533_hx995w.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132d13266d64---tumesimizaluxewaduriji.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021062009430580554.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/zexefo.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/81278311253.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/tanifexezerojimi.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7f7r3av40oul4mqtat4udq5npl/54525347377.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/lidugusixut.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/6l7aivlg3sbcomishiuknm7c72/14534461693.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zogubu.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/donupulanudeburot.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/37934809222.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb399a2183---4543521440.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47e6151690---98639146270.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/jawurazaverubaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=jewish+bible+torah+pdfPDF 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_off0000c0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A5 10708 bytes
SHA-256: 8f23dad563b2f3dc2e9eccd0e33481872be31f85103074c5a1ffa631cb32a3b9
font_01_sfnt_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 19088 bytes
SHA-256: ae0e11cefac27787c0e9eb1f08aa65d3c2cf63b9bda40c3278973c9ec4c081ca