Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e07c07475a55454…

MALICIOUS

PDF

87.0 KB Created: 2021-09-02 20:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: e6c41965dac68edc3e3c0cb14a320043 SHA-1: 816ca7b831d8f1869bd3bc61d3b93a09352eb81f SHA-256: 5e07c07475a55454fe3e981918d9b9ec574ee84c67fc40ece89d077dea9b1d49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm used to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://szolnokepul.hu/userfiles/file/98424335393.pdf In PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a0c01e82819ac5fccbd4f40863b0af37/lewodisu.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/45809428975.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0238c1105f---tametozigi.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/13178443933.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/8aacbj3v0ifn7tqiv54cvopp7o/woluvilowibedo.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/95191995393.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/54618618771.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/latekigositedofipex.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c549ded9018---sufirepukofopirupud.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/jefigixifugofuzizafumil.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/wubakusipokas.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/mpp597kqf7tbhap7ur8178v1j4/76363440427.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/jesudaxajemora.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/j7ot6jbirc157opva5srqi1666/73253289762.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f123d0061---rodijesulugenoxonifiki.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/zeduzopemojepelutariw.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/59147197982.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f5a063c52---46515367457.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/56667238287.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/39164881085.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/50963664686.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/4c255cb0152ea52888280ead8f5713c7/26696761217.pdfIn PDF document text
    • http://anm-av.de/uploads/files/felopaxe.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/45f27489943b6cca8359d3e1f0f6aed9/tusenewodawezinoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ur+nammu+kanunlar%C4%B1+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_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 20348 bytes
SHA-256: 9616bae4056f766e5cd0ee4366733b12683600dcbdbbda275401b849c040f1a8
font_01_sfnt_off00011d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D26 10296 bytes
SHA-256: 4de2b4d6b337e2d499f7fa6125a1e26f324a8aea70870b911803bab410f7cf95
font_02_sfnt_off00013422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13422 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1