Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af023d40fb74279…

MALICIOUS

PDF

82.9 KB Created: 2021-08-15 18:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e1e62795d47b36625d78eedebb29a69a SHA-1: 8805c1d7c00e7653d869f431c5f52e7b25d1c286 SHA-256: 8af023d40fb74279a36d4881194be3652983bd78dac5d3520d23989635de1814
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to host phishing or malware distribution pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ac622909---daborukikevajujewin.pdf In PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/ef194d5699b762443a3d5d7e4712657c/tesamoruxevizexakadusof.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/jejuvosisofepovaxu.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/pupojevavekamodag.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a4777c57495---zovigokadatuk.pdfPDF link annotation
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fe7ba396c---xirudibagexekubeluvip.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///zozewonakugogogovuvakerof.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7433cc39046efb4e5b68e4fd44430b14/63992834448.pdfIn PDF document text
    • https://elitediesel.com.br/ckeditor/ckfinder/userfiles/files/51022983992.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/dbf88a8eeec4e0fde81396f36defcc3e/filazixafomowoverenufo.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/7f0ce847a5afc1b99e316cb6d317f2b3/nopinuvidebosusowelom.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073d376de94e---31727717109.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d50b3e4ac---53851856699.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/wewukemudotisijivewawor.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/nokavivuwilapo.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55144779268.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdcf918153---16332056053.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/rugafi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4237d441---kugurege.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/47995739927.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/97ba9a4fbdabd680ac06af44e72f2ce1/56226267991.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4e747ccb5674c57a066e9bc87904468a/28523589564.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/wekizenabivevi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746b7ed5335---57608673926.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/botula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=aquinas+college+menai+uniform+shopPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 18576 bytes
SHA-256: cdec55dfe1ac5ac47477f52f027d971ea8e79d1b2bf2a378f1c1324fe6033e03
font_02_sfnt_off000121ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EA 11056 bytes
SHA-256: 158a0b7f1e1823c505cc7b75162eb338043c50436f864c17370e50d6388f6d1b

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