Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a49e6e7d2759eca…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 14:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 655c518ad0f9e3d814d360056715708e SHA-1: a849b21aebc5a891059e10ecc3cb50d9b4e5d51a SHA-256: 0a49e6e7d2759eca31c1caf6984332b12ec30abfd48999f1d7da3efa0aac6833
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 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://myshopekerala.com/userfiles/file/zawazajawux.pdf In PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/97794332157.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c9190cde291---xenojutavowolafulazu.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/zajevavabonidukalubagafe.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cab3155c9---gofipupabusidago.pdfIn PDF document text
    • http://goref.ru/files/file/36465586007.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2e5fdcfa376cb1e5ac7032f83332d7eb/moxamunonedexik.pdfIn PDF document text
    • https://led7.ru/file/92090440746.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/3871673156.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210628202817.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/fonibufojasemewafa.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cc682b3f1---fosur.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/reniwezaruzikeguvupi.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c471da767d88aaff4b622fe568cd5a43/rojefanapu.pdfIn PDF document text
    • https://aedwea.com/upload/foto/xoseparepowapozabag.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/suxojexijijuxuzowiso.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/g5q0a7psuokidl92j7c2qbon0r/51026860688.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/dowinusivozudonife.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/28858681596.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612936a883af0---labagoz.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/46817207341.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701dacbd39e---tibodov.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff0221298c---rituxiziniwowovemexajure.pdfIn PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/tivexenusulo.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/dikezeziwabovi.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/doxujubajemeripifojuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=unwrapping+christmas+miller+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_off0000e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BE 11040 bytes
SHA-256: cf3a45ee77b42512b46d9af757cec32f516b257a8e3dee6305da1e2c5febcc4e
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 18520 bytes
SHA-256: a1554d0673dafd5a26a4a2466c9722a7ab1361e9e0a45491d555465434ab5c15
font_02_sfnt_off00012e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1