Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbeb076ba0853987…

MALICIOUS

PDF

86.4 KB Created: 2021-08-04 16:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ca3ca168f62fc31064526491abf432b6 SHA-1: 92b94271c91c63957095d0dfa4795ff333ae3682 SHA-256: fbeb076ba0853987e77d7b4716020d725aa76f253edf9ce7a9c0cf1fd287b51d
156 Risk Score

Malware Insights

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

The PDF 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 containing numerous URLs, many hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of multiple external URIs and the 'link farm' heuristic strongly suggest the primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c54d17d1---59748686957.pdf In PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f06701e55---36009427395.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/babimifatawum.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/08449f6b52574bd9a35528167af96f40/74227244528.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/3086e594c4346acdce45f96c0b72f134/86041715297.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de0770423d---wevavudotunegomajexef.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/22873700333.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aee8e0bd7c4---50759191479.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e8ce6fa3c---22811503360.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cd9f3a1a8---39974718082.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/74566189017.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/af043vgc29nqt9endi0dhip49l/zukezugenojovurojujose.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/74580341064.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/81141563007.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e18a96d06c---xodokixuli.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/33074897488.pdfIn PDF document text
    • http://prmakeup.com/Image/files/72363411975.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/webeganololofufumubigi.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/24724514122.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e5d1bba72---winokuxawomibe.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/6324fa20b95c16194e3be3f7ba7d600d/5317854739.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/34176891339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hl-l2380dw+won%27t+turn+onPDF 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_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 10552 bytes
SHA-256: abc5b4f973a481f15aae1e20fe168c0eef476828f28a4510d125e1ac8d63d9e4
font_01_sfnt_off00010648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5A 17056 bytes
SHA-256: 842f05287af060c25d70da6514e04b82da7fc6cdd9230ce5fbd66bc1422766c0

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