Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc07f3d1de59754…

MALICIOUS

PDF

163.8 KB Created: 2021-09-02 02:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 40b850d5066c11665e7f2ea16d709aab SHA-1: e38e5870025fe861e7b73545942b17dfc846c493 SHA-256: 2cc07f3d1de597543bbc79b647e179b774d32e06340c4f599b42c215d50d78c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an intent to redirect users to potentially malicious sites, aligning with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://thevenetianmask.com/clients/71561/File/muvaporifume.pdf In PDF document text
    • http://nsureunion.com/clients/71556/File/15733781080.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf29347548---retajadejijupinidasojog.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210823225655.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/98jscdcdhm9f2u8i56u7i2bcjl/dotegozesuwomiteni.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/fefetete.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/32fe2ad185ddaa483dfa79ddafd318b1/dezidonorojapikota.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/74a3046db695e101dbd104bb7087f890/57780317839.pdfIn PDF document text
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/deluzuwizifujavagum.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ad35d1c21bfe03d9028dee7051f8b847/zuvuvedumitotewut.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609616e30cc6b---sekidawilumep.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/88997501078.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/bowisamafasewuda.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/kowiwogebijorugupi.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/zakomed.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a116bb5b748---58634167363.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/79712652946.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f5c5286a1---jasonetiminex.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7710a1527b---5923691547.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/14466862275.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/gue95fs1qe49ulb99v8qdb6k60/88398162454.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/jiwefovategusev.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/94679156886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ciaphas+cain+the+traitor%27s+hand+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_off00021e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E0F 10736 bytes
SHA-256: cd5fc1d2178c8fa93c6a3fba13f67d6f3a8b0e0521a42d4e5a0f63bff8afad80
font_01_sfnt_off000236bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236BF 19564 bytes
SHA-256: 0ea686779138488d20fa0361df9995328bbffd8dc48a38b0c161d6413f3ed219
font_02_sfnt_off0002693d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2693D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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