Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c2ce3cc558cf55…

MALICIOUS

PDF

78.9 KB Created: 2021-09-12 07:35:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 02f53bf4970c935342fe5a36ea3af10b SHA-1: 608ab2e95cc879515d868a1eef6ee5adce72a9ba SHA-256: d6c2ce3cc558cf55da6c7188eb45a9c196fbdc00682e92bfd6657e60e20d50db
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://listapp.in/ci/userfiles/files/wifejixibobazonobakemezo.pdf In PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/ninebilevofubupib.pdfIn PDF document text
    • http://isgsrl.it/images/file/37439504333.pdfIn PDF document text
    • http://tonerihned.cz/userfiles/file/38051976380.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210908150115.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314e3f45e52---64385875385.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/20925844828.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/wupewagaketifed.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16136d4a3602ae---mawav.pdfIn PDF document text
    • http://asid.rw/userfiles/file/82388787050.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/4330857436.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/67273064511.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/9382325231.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/watadumumanadadedemaza.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/puwatope.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/97747843192.pdfIn PDF document text
    • http://aa-nusd.jp/89059834915.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/fojaniga.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/50842661905.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/jinimepaxinapu.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/55af028dfd32a4907851b6b32940a78b/lasodaxuwonisegedenel.pdfIn PDF document text
    • http://huiking.cn/uploads/file/040829221322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+10x+rule+book+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_off0000cd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9B 10540 bytes
SHA-256: 06cb4e84b5f9bae089ad3654afed3d83d7cc8f773de6d0945d9d8010601cd211
font_01_sfnt_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 18792 bytes
SHA-256: 936411d1bcc394134af1be9d5433977d3e605a584825e94750d6cd4aabc28bba
font_02_sfnt_off000116a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1