Malicious PDF — malware analysis report

Static analysis result for SHA-256 076841fd7e0263d3…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 10:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fe0ecbda810ea6a0d56635dc3a43c04a SHA-1: 9b0f7a6f941e3f4f31227ca6bfa6d2416be0ce23 SHA-256: 076841fd7e0263d35cd757a6381ee5d14ab9e916697c233bb7eca220635bfab8
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 or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://acm-medicali.it/userfiles/files/56285743716.pdf In PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160caa0f56df94---10644119069.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/17311402183.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/83945669502.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ae975bdf487---fasapenotavegejot.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/benabutigazajulomo.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/7023307135.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/20236832014.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/3b1a873b68a6cc151e0bfaa66e39bf62/gatuvemufofuwep.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/65123146326.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/zesujusesonevowusilawobi.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/kemozilepoxadasumuneg.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/kofonu.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/rimapaxifimi.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/96166965203.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/mejalelasavarawuzizojezav.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/2e130b3a0d8076af6ab967477648835e/xuwosoxem.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d22f728de---xulifaredukenifove.pdfIn PDF document text
    • http://skene.es/userfiles/file/ludubomomawejuwe.pdfIn PDF document text
    • https://aromamarketing.md/img/files/78055849759.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/33561005788.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9376a271a---41481551681.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce942cd880---9774873062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=does+adding+an+adu+increase+property+valuePDF 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://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_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 17932 bytes
SHA-256: 85f63a01684d04b6727bed3c9fb79d519b547ae069a64147966e0ea028b739aa
font_01_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 10968 bytes
SHA-256: e67fbb2aeac4a8620886b4752765eae0ad299917ec6b9b58c91e5e53ac3e801e
font_02_sfnt_off00012ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1