Malicious PDF — malware analysis report

Static analysis result for SHA-256 36edc72c770ad9ca…

MALICIOUS

PDF

84.8 KB Created: 2021-08-18 02:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7be14edfeb0a05e4206761d02144cfcd SHA-1: 70ab007c84b9aaf2bae746f9d3e962b4b0abc249 SHA-256: 36edc72c770ad9cadae0858fa665175ba4af32c3e87092e922d418966bd17ab4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ghalemdi.com/userfiles/file/pagofadapazo.pdf In PDF document text
    • http://balone.net/_upload/file///guvoro.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082563a9f7e7---sesesubogeji.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/15643199693.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/qenpqtd9c547opmupfi22gbmbm/88429770394.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/54923615528.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/ruwuxisifefewa.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9a2e7232696e14703e44a56dd86c3460/dujupevun.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7aba7989fd9f15a665133caa023863b2/40471978523.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087546ced68b---vidudowojewiwevotubu.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/57136293042.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/mojovobipoxuweb.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787db359255---gobumofumoga.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/a58fa18c15e41d77c8b997fa8f82a1f4/49937811608.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/204983907.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608162fbda080---91011852506.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f15f4a93d1e---bezivotonewilenimezo.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/bd2b7ed4c557f4ba22146cfa38083f5a/najiterivezobikagufumugid.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/5da845b898149ae7a7a7f058439030a0/266169410.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/c449f0d25c3e47c62cc9334535e711d2/nasitokexizaxoseza.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/f7a92e15a39817b22b898345744aa59c/47016467826.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/bukopuwunolipetexig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=le+royaume+de+kensuk%C3%A9+r%C3%A9sum%C3%A9+du+chapitre+7PDF 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_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 11200 bytes
SHA-256: 08092698d70a4e8e0eba33f87f27e5eaed31a640bd95e00c1c476f9ded9958d2
font_01_sfnt_off0000feee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 18044 bytes
SHA-256: 4a62ecb863391fa4cac316f68a639d20790aea355122c33dfcd6fb8b19c5f26f
font_02_sfnt_off00012b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1