Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41cdc8d60ae109c…

MALICIOUS

PDF

84.6 KB Created: 2021-06-27 00:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d49fb26327c2373dc0b2c19ba3500cc SHA-1: 7f3d1c3487f81c05cccc48d5e78b9af1707e2c07 SHA-256: e41cdc8d60ae109cd351401e707a86d4280e8588f6c6dfcda90a7c2f69f41910
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ebslang.net/_UploadFile/Images/file/89927081557.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a87d6ce1eed---dekupoxemodibedevuregivi.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/b0528ee7843b6352a07191b8cebe30b7/56558399709.pdf
    • http://moreit.ch/productinfo/file/kekifelugutozo.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a2bfc74a0---fawovizuwan.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/860b4a0367d77f942dc67439cfff7c3c/34316362201.pdf
    • http://khodahoanglang.com/admin/webroot/upload/image/files/51247008824.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c984e757---79053050312.pdf
    • https://dacinsara.ro/fckfiles/file/42890432641.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/2ki5vvp2rgo8o698b9200v0b2f/balukutezevafaj.pdf
    • http://ersatzmonitor.de/userfiles/file/27888481378.pdf
    • http://bioterapiazabiegi.pl/obrazy/file/jiwuj.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e247d3b9ae.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746d5510d0e---84014754472.pdf
    • https://beysukonaklari.com/ckfinder/userfiles/files/fugixirupinuribix.pdf
    • https://zemiigori.com/uploads/file/77142524259.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074a02c245f3---60964585433.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079ed804e0a0---jibaj.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-5-7/20210507120313228408.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607262a99a6b8---surojezirefofuredugide.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbf88f1f0c---tamilifenub.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb04ed283e7---30459057413.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb1jh9ngch0jnvhg99csdt175v/2050606793.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=where+is+the+929+area+code+located
    • 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_off0000e606.bin
03eba891297c85c23872801cda77dd4d71c2b871813b0d7de4e6a955cde9481d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 17636 bytes
font_01_sfnt_off00011447.bin
2aa9e3545a185b8134c96a07198ec8eaec8df3c78db375e28de1bbba962ed0e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 10644 bytes
font_02_sfnt_off00012cee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEE 16792 bytes