Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69bd75e26b10958…

MALICIOUS

PDF

107.0 KB Created: 2021-07-03 12:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1487abd5a9008829b92cc627dd4e9dc8 SHA-1: 3cc6d64dbe8bc07a8b372c719a1ca9a3feb4468b SHA-256: a69bd75e26b109589bc8750753bd42d2eb8b08ee602194216515fa827af67ea1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and other disposable hosting, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and numerous external links are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://stphilomenaonline.org/userfiles/file/xaxilagovovaj.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e092eeb8e4---ruzukavalosexuwutez.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/9d95e40dbc7bf8d4bd45f23adadcad07/93240031329.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bd85cef6b---jiminizalizomirebun.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e92ba723f3---mibet.pdf
    • https://clubforeducation.com/FCKeditor/userfiles/file/23773074852.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3af04fd00---57007342211.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0ad48c0b8bae5bfacd5b261a01dcaf33/90684274940.pdf
    • https://igescanada.com/ckfinder/userfiles/files/32616724953.pdf
    • http://curry-box-deluxe.de/userfiles/file/vujesuwa.pdf
    • http://yilip.net/userData/board/file/28419282562.pdf
    • http://naoshima-habitant.com/1970995428.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca5d673275---82398870483.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/41249665ee3bd4ed31356967bec425e8/gakotipixunisisurawi.pdf
    • http://onellenorzes.com/uploads/files/17228148282.pdf
    • http://dmhu.eu/uploads/uplib/file/fuzumokifazozukimuvudet.pdf
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/16671019165.pdf
    • http://cesishotel.lv/res/wysiwyg/file/54880536214.pdf
    • http://komputerzagrosze.pl/userfiles/file/pumidigoxozuduror.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b450c62bdc---69443769797.pdf
    • https://muacash.com/webroot/img/files/89103446487.pdf
    • http://ccswcd.com/userfiles/file/luwexafozi.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/dgvqo3rben9hnabh8jp4m4clb4/22028685059.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e046bda351dc04e750cbaa43f65685bf/wuwubewiparotikupamo.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/fogebaxojaninexapebive.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=tale+of+the+nine+tailed+episode+release+date
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013147.bin
2e65dda57d2f3a703961e46772c846ca09bcb891d7fcf807177c68a87a02469d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 3556 bytes
font_01_sfnt_off00013f43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F43 16792 bytes
font_02_sfnt_off0001575a.bin
8735ca30ee5164cf51b8f48447f8da9c233e24cd9de4ba8c15e5f5de4082177c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1575A 10560 bytes
font_03_sfnt_off00016f58.bin
a68ef2aaa374ad18f8b42731239c73e59dbc27b200cf3bffd928b7b1e4817a73
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F58 17752 bytes