Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbccff8f4f6adf6b…

MALICIOUS

PDF

87.0 KB Created: 2021-07-14 02:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 03d168c4394b8539187dd991711ec4e2 SHA-1: ebedc2d01a399a72930698b28d27a4c7d17f1757 SHA-256: fbccff8f4f6adf6bef681948b6c1a04cc5f360fa8fed2be8d6ba04b882bd78e8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://billcolletterealtor.com/clients/e/ef/efe7172bdc9c6addedf700543cb5cb37/File/dobelamabowuruf.pdf In PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/vp5lb1emf612nuifh9v5ejcaie/27327880867.pdfIn PDF document text
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/kumuxivizovevewane.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/29scv0r6cgt06l2vu6ar7mdhcb/36014947062.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/46322953875.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a68e8fcca---65080704470.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/37733746280.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/61024958968.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75a381cfe1---fewegazubugoveji.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/fasedanabo.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/d4d7j0kesackosic9mga7l1m30/36584456781.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/zevezegurerafimon.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/44036165412.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/bivinosogop.pdfIn PDF document text
    • https://ekransamara.ru/files/316616403.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d043a057---bazumevimurilefazi.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/ded1da50fcf328907406993326cb4175/wivogaludumek.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zikasilukalosojuzofif.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080eea4703c2---78200567558.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/buwudotamu.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f752329eab---10096546290.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/d8qnenjl4akukrhfn8rcpveu22/36045073014.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/tojavutiziwower.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=north+star+drum+and+bugle+corpsPDF 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_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001076c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076C 11084 bytes
SHA-256: c8a22bb31632706a56bdab5b0bfd08927d0137857afa0ad4106b2b339fa8036b
font_02_sfnt_off000120b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B2 17716 bytes
SHA-256: 9ad4af59c64ac38e66deb9c1691c7d5941deb2c84a47b69b3b381a82466d9075