Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2c6ff072fd9d4a…

MALICIOUS

PDF

92.7 KB Created: 2021-06-27 11:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af4162e41024dbe7e39901f014f1bcb9 SHA-1: 30d9f6473b079dcf8aa592f85c063201fd1170a6 SHA-256: 0b2c6ff072fd9d4a8d42dbcc0db72385d9aa2bfeeb716becd8f73a539476cd00
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=protime+and+inr+test
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae35379d9f8---30407922273.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b96b5d58f4920ddaf5062a836240b822/nizakemuripubutazis.pdf
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/5939564568.pdf
    • https://notrepanierbio.ch/userfiles/file/41466112442.pdf
    • https://baxsporthorses.nl/userfiles/file/60254757065.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc71bbb3ca---bemaxinupalovavezi.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739edaf0c5a---xijibamoruladoji.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd74ab4ef---46255207823.pdf
    • https://uppersanduskyrotary.com/cms/files/File/terapotofidefupewenilaful.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607a430be6b0f---52499043904.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/3oe12ahicilc200pknp0p81pd3/35076146455.pdf
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210613022923538427f5g4ex.pdf
    • http://ototavandosemesi.com/resimler/file/gexemawesebarowewaselo.pdf
    • http://chukgoobok.com/files/fckeditor/file/wogusiwifuzogi.pdf
    • https://cuisinescartier.ca/upload/editor/file/32344244529.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-2/20210502122530804674.pdf
    • http://hgbs.de/userfiles/file/48054868284.pdf
    • https://shiokuda2.com/contents//files/gasilitupewewujen.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/s31bv4o36rf588ptugom61sota/zikunapifesasiw.pdf
    • http://brandnewgoods.net/userfiles/file/57276817449.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cf748f0c9---56173884201.pdf
    • http://dgjst.com/upfile/file/latewuwuzugotewesemelo.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/67992804b5668c4115e91d6861b4f5d2/mowivijubo.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62da3e48fe---5654875178.pdf
    • https://nusamulticentralestari.com/Uploads/userfiles/files/41505731623.pdf
    • 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_off000105c0.bin
808da76250b78c2f524eceab6d0eb52af9be49dec44d85192d04341e815cf306
pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 10364 bytes
font_01_sfnt_off00011d25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 16792 bytes
font_02_sfnt_off00013537.bin
fba688bf12a5da73c17e72fd5e1f506ffba2de9bcd55288a4585b89b2d8ec5da
pdf-font-stream PDF embedded font (sfnt) at offset 0x13537 18920 bytes