Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbee8abdc4d0526a…

MALICIOUS

PDF

80.7 KB Created: 2021-06-28 10:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e7591069449b76fad91702212ab8d30 SHA-1: 8c618b5d8f4a11c646f7b7c67dcfb06f9a777f05 SHA-256: fbee8abdc4d0526a0eb0960233924c659d4cbb24443b920070ba0ecee6994fde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://alnadaoil.com/userfiles/file/84552241965.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/79ea3b356b5b62750870c6abee4ba40a/2813539206.pdf
    • https://steklo-shik.ru/userfiles/file/jebuv.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6689e1f850---zegaxujutaberefawepol.pdf
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/sorelagisekuvewoxulerot.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f6a434456139e324709c28370416e122/89421768610.pdf
    • http://hayatteknoloji.com/webimage/file/fatepilukam.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160870d3e741b5---75625094389.pdf
    • http://westernmaki.com/uploads/files/77238668338.pdf
    • http://abogarestudio.com/userfiles/file/bupabufezeviwivu.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607b97c263ce4---9354609910.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079f20643609---kasujosejiloveranugiti.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/27kge9qnq81h8hnqir1rdf4lvt/66742316031.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/1aafc20d64f3284390e03a042b4e8810/39562629978.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/35d96afbe219d0c92ca31463c1936eed/pubaxudugirijolutas.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16093b01586ad3---42167500812.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1e32062ff21de66ff82c45fd4fc6c97e/tidefulenesoxasexek.pdf
    • http://megat.pl/uploaded/fck_files/file/91082668516.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/vijaxeboxu.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69f67a2d8b---98004781362.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a421b5e7fd---85227462170.pdf
    • http://mtecommerce.it/public/news/file/nalujuxixaxusikodu.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096874608474---68043323268.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/kad3ssmsdpfv9hqleshgpim2vo/futuwekekuvejasivujasa.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821f6f654f1---zitupebijapebosagejigo.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34c075466---41724383097.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=f+major+scale+french+horn
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a6.bin
5e4eb9b2da49804860c85a31319afc2795dea80f5ed87e5a3e6b16ed808aadb3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A6 18684 bytes
font_01_sfnt_off000103d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 16792 bytes
font_02_sfnt_off00011bee.bin
b0091e8bd557ef392e8211f0068587a3b8b23a5d54995721c242954908e0d5d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEE 10516 bytes