Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daa86564e623c4f…

MALICIOUS

PDF

74.3 KB Created: 2021-09-01 13:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2ef43e1a26b6a712bffb2e58a225d046 SHA-1: 4175ca9c7ac2f4c4bdef1695eacda1a67ebb3fbe SHA-256: 3daa86564e623c4fd956b3b83124013cd5866d1333a390519a9316f310c5aa4c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as link farms on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The primary attack pattern involves directing users to a network of potentially malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://kovove-ploty-brany-zabradli.cz/UserFiles/File/29784766164.pdf In PDF document text
    • http://joeun-it.com/userData/board/file/nexovafemuw.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/3t9hlkn6inq8hidvkasb47tld0/fepeginalusan.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/40945277861.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa2895639a67083fb06c19096bdf49f9/57665375021.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082da7b658ec---geragedipazeb.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/67349584658.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/vadov.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a7d852c1fee45947658ae3f1fdc6c2ed/mawoju.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807f187159f---bafuk.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/falhep05075c58hlv087i3mui2/xatubobil.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5dfd1579b---37246834401.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/gopugok.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe0dc1a567---bevevuwifukujupa.pdfIn PDF document text
    • http://www.pilartangguh.com/file/tusubezaloxadojunomibosa.pdfIn PDF document text
    • http://rfamilylucas.com/clients/73238/File/nufofizijigigumuzem.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c14ff6b3b4---kewepubesezanabe.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35d0eecfb4---tetagagegasu.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/88456204114.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/52112171976.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/pazufuliwekovemaketa.pdfIn PDF document text
    • https://slide-bearing.com/d/files/gububulagagakax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=molecular+weight+magnesium+sulfate+heptahydratePDF 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_off0000be57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66E 11360 bytes
SHA-256: 73277b1a73cf85a8d60195ce9ae06acaf3731218da10d7d6ad3849d5d160cad7
font_02_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 16268 bytes
SHA-256: bd03b64a0192aa4bba5bd3f0e2c7f59369a2cf72df10aa1155614ef69ac1e2cf

Open this report in the interactive analyzer, or submit your own file for analysis.