Malicious PDF — malware analysis report

Static analysis result for SHA-256 be22c6918f2f7825…

MALICIOUS

PDF

86.6 KB Created: 2021-07-04 17:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cd7b4ef914df8ee6a8f89a87070388dd SHA-1: 01d4e9b376cadefd527a1cfc9e874457151c099f SHA-256: be22c6918f2f782528d53e2a1bb9cc3066355d813d1e017a317d6cacbd9c05bc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The presence of numerous links on disposable or compromised hosting suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/2b7ea3ff2a71c4bb04c48e214f73d51c/tudibusorezonij.pdf In PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/19881702262.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4bab0a3db---53363807957.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c935ccab019---86518786987.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075acd994f4c---16645893903.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609d555082d3f---biraxulitef.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/15753094150.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/bd43f42b044e44d7b4956b5bceda2fb8/8281314216.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/migekemumasoxaditunig.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b77aca030e---68553600346.pdfIn PDF document text
    • http://alkanboya.com/files/file///sobipopafibomefet.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/17683692789.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/21708904851.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/077dfa8033b8403a0f8c548419d330f1/vubokumiwetoj.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/jitulajegalirupiziwido.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/sejozinexi.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/4163508794.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/40000170013.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/bagoveresozegetabiberi.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fe1fb5134---67681083032.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7f5eda4d583b41a934e3a5de1aab7df0/kumosaxolamemit.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d8b34bef673316f891412afaec66fc57/vezajepukokekadexe.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/oopi8rs1tkmqb03tjmceb09co9/ridedilerojune.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/68892883686.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/4bf8d6b8878207791a748860938ee10f/goguzagofoxowuwo.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ca353e5021c0a2eab85200bf1321b8f7/gexepepakibitewafoxitovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=all+might+suitPDF 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_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 17184 bytes
SHA-256: 8d8165e4a1d5062c4806b13785438fcb0b61f4c6260d5d4501b3589a3b2364b8
font_01_sfnt_off00011f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13763 10016 bytes
SHA-256: 5d28bb1c7a97c18d2f912d78c97a4c029e411901d5047c94586249387a3b4c4b