Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c62fbca32d68a02…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 05:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eb685e152a19774b5a2ce2833fb1c47c SHA-1: e389afa273c4c985ac95311ec1636fad15cef71b SHA-256: 6c62fbca32d68a02186fec3a891daa0978373a04c9451ba766188c621ac00dbc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://profitaler.com/UserFiles/file/91280258641.pdf In PDF document text
    • http://barrospizzadb.com/uploads/files/mujufepibe.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/14980973642.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/c4a730691eeee1384eda0126ccce4161/1036486991.pdfIn PDF document text
    • http://phongkhamducphuc.net/images/files/3046344010.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/82447548713.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/dg8r1jaqifig084e6c78295a9a/80223356790.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/3glk9i6o47i1vad2v1c4na650a/bajowolopoxepamidoli.pdfIn PDF document text
    • https://investir-petroleo.pt/ckfinder/userfiles/files/84365911851.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/dugazoraxebijapuxijugoxaw.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/sopitomexigewu.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/totalaruk.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866c9d49517---pomujukodanasiferebejo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5c7177d37f8f502e33bf6c28f6139554/vedojewipupavewo.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/kopazetisesetogosejoj.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/kavemuzevogo.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1aa36db95---59140437845.pdfIn PDF document text
    • http://healthywithhart.com/res/file/batawezabalalefuso.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/41ffdf41173474bdbf32790d789e23b4/84892005869.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/jarav.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47cdec1d75---70468280766.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d5eb57fd8c54febe05a0cb0cd92220a0/fowefe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa854bc61af---gufili.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/lagaxowuxuvanukena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=active+and+passive+voice+worksheets+for+grade+8+pdfPDF 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_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 11284 bytes
SHA-256: fd3aad31f5c0602e3811739b2bccfc5a19f330c189c67cf13519ab24f972837b
font_01_sfnt_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 18460 bytes
SHA-256: 4d6fe2f7b259a4746d52926b89781eea19c8a88d8cd01d0706f72d61d7cee6f4
font_02_sfnt_off000124ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1