Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67d894a37e4eed3…

MALICIOUS

PDF

85.6 KB Created: 2021-07-23 16:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b748e7ba770eb5e656b96f0cabf1a6d SHA-1: b4758a1fda796987167148c6fb029604e876701f SHA-256: e67d894a37e4eed3f7b88b1a2abbf8060f412e1e9c9084cb40c9ab2d6a402b42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, specifically targeting the formcraft and super-forms plugins. The primary URL identified, http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30c16c4ac2---95884706703.pdf, is hosted on a compromised CMS upload directory, suggesting a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30c16c4ac2---95884706703.pdf In PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/b27ei2k5785qh2iaun7t8fvo83/11480275676.pdfIn PDF document text
    • http://ekotronic.eu/files/file/zixopolubuwopurejesam.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/26a552272683ace6c165c646f22e1964/31190200209.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/sawatawumerijenipa.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e0f54c1d636b267e7bea54533836cbc3/xadewowu.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/mefufage.pdfIn PDF document text
    • http://vce34.ru/attachments/file/bofopinisozegoredokifi.pdfIn PDF document text
    • http://spencerrandlefamily.com/clients/864257/File/tafub.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/75069204283.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6pph1os199okvhn1k1qmfp1pps/44638513399.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ca27bd99a---5992312333.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/gajakikisemusevowotapope.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/87242321179.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b06c0d1ba---safufomizem.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/siwajurukupinavosogewu.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3da5ee72baee990eae51b43baa14e288/kuxosuxasazoxagekexak.pdfIn PDF document text
    • http://berbun.com/user_img/file/xudugopeze.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/67587088297.pdfIn PDF document text
    • https://orsolyajuhasz.com/ckfinder/userfiles/files/74932324399.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/9prfsct8icv51n2rm1lon1no0s/76782767290.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706fc956db6---tilolibutulipesofoxi.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/navuni.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/vcn9k4djo2k2cc3mri0k58reim/77072969638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=is+walgreens+a+24+hour+pharmacyPDF 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_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 11080 bytes
SHA-256: 5afb201442dc9812b649676be520321f8a40a3b9f14813c45b16aedda6998ccc
font_02_sfnt_off000118f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 18068 bytes
SHA-256: 4cad1802425cf5db8a3e2f14d0380b90904dede805d944ed2d055bc1d32ced54

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