Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15cc6d067657a2d…

MALICIOUS

PDF

78.8 KB Created: 2021-06-27 01:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: db12a2c37bec6f14ad74767272b83d67 SHA-1: 03804c7052b7877f3fa61c65281c6bbcc7029073 SHA-256: f15cc6d067657a2d7c222c7a392e4ed65362742ecba7cb4638a27d7f8cd528a5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://wastran.ru/uplcv?utm_term=bass+guitar+minor+scale PDF link annotation
    • http://alimentosldm.com/userfiles/file/1567761010.pdfIn PDF document text
    • https://aokman-drive.com/d/files/xigilugozuko.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/15188757062.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fcd675de5---risarojejijidus.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6cceaa73c---57174765909.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723ebd72036---nisupujasatenufepixadoda.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/vubudodunubomuwoxelis.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/59524492036.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706bf457a36---namaraloxive.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///71967135449.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160743c29171a8---54683110279.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/tnu6eg04ljnc8g2mo0urpicou1/sejepulonufajas.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/3cc0de6f4b7b34851ef6e1abbac84297/14726121081.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deb882b5ef---32053666522.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/70771153324.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/dojadibofezeb.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdaa761fb6---vubitojovubevelasemisowe.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/nv11mtc7nnb4bvg44b77pnonf6/woxulogiwok.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983b8e923a4---65662804690.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/jonezorosakelex.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ae3b2847---vitalimuvijug.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/p6egkrcqu8bbsqif6j6q92uvm4/4001332721.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/10942636842.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/15195686142.pdfIn PDF document text
    • https://patc.fr/imagesfile/52012758305.pdfIn PDF document text
    • 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_off0000d249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD249 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 16712 bytes
SHA-256: b69ed1f18979c21cda07f07071495dd0c122dd8f229b42e0b607dc8322b1eb69
font_02_sfnt_off0001152b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152B 10728 bytes
SHA-256: 44434a256caacaf9db4ada14be6625f128808a1b9315bb7f7a73c3a1846ae29b

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