Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1ac07202ab7849…

MALICIOUS

PDF

86.9 KB Created: 2021-06-27 03:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81366715095a5b99a41da8aaa642fdd4 SHA-1: bf51621731a5e8edee70f002d60f50e1c8bca82f SHA-256: 9e1ac07202ab7849b2a0d55bdf14ebe7f75d4519f54ce03caf1098524d69032c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://queure.ru/uplcv?utm_term=the+biggest+ocean+in+the+whole+world
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/lo7kfma445jsr252ckc9n4mq6g/doziwadonozanadagem.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc60a8587---xobilokofu.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/9r1hs20b8grjr4jaivpr6thuk0/40645242661.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/2p6u1t462tp6vs76u5fcl7eido/xikaxawobaxutunagebuf.pdf
    • http://buddhavehicle.com/userfiles/file/wafekajisibuxoxixonij.pdf
    • http://adabaskimerkezi.com/upload/file/18288365296.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16086d215c2bf4---83149658043.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9a1891e853d50ddf34c104b9256f736d/zudarogiz.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/8f9cr86okntm10ck4r8fe138q4/fepob.pdf
    • http://frangarcia.eu/upload/file/laxipoporuzaxekuraxu.pdf
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/bemokadaxonixudagevuxe.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b1135565---85217670770.pdf
    • http://jshtextile.com/UserFiles/file///vevokona.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/0a1c1855f9686ab1fb9083bee06fdf66/kevopa.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb0f3b70b7---59748646409.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992f9f8d566---wujijadaxelojuwiwixumavi.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3badc497a---kenonugubu.pdf
    • http://anchor-m.com/js/upload/files/29112470700.pdf
    • http://shelton1961.com/clients/35589/File/levifamopafate.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160703fa64ef2e---7164938705.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c898bbea417---gulukevenis.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7cfbd2871---rakatozonona.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6361db7d83---setovapinipezarut.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_off0000efec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 16792 bytes
font_01_sfnt_off00010803.bin
2d6849c9b3bc8908b9b09a3c457f3f676d7ed4550cb7fc966e1088d85bc4061a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 10840 bytes
font_02_sfnt_off000120d3.bin
849a11722c7b89201eb6e948ad7c6e7b2fe48d9936d1e1327d343f100bb1eed6
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 17456 bytes