Malicious PDF — malware analysis report

Static analysis result for SHA-256 732a620f6f879733…

MALICIOUS

PDF

85.8 KB Created: 2021-09-02 01:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c8601431780e4872c4b8ad3ffd75937b SHA-1: ff5db14a3c4d82e7a8e2780c3b592a52ca1ea65d SHA-256: 732a620f6f8797334e70bf1eef56670308a18baf7268cd281849f96c48695fe5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the link farm structure is a common tactic for redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huiking.cn/uploads/file/29023518180.pdf In PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/jetogazadozunafip.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/a1ae3bebf5fc601ad1b27687eb68bd4f/55145626408.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16084851e84a38---32337050306.pdfIn PDF document text
    • http://07-3739589.com/CKEdit/upload/files/14049113213.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/78397961532.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/50064125625.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607411e118703---69941725780.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/58bf255d96946890d516e9bcd703e0e6/bomupiwanuf.pdfIn PDF document text
    • http://abwessex.com/uploads/files/dugenopa.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/36397343625.pdfIn PDF document text
    • http://plncse.hu/php_data/file/gukupatupoposinedagile.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f259e984c0---vogowubepaxupudotuboda.pdfIn PDF document text
    • http://hzqzg.com/d/files/newawamadorolisaxe.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f79e34d9---vuwoligujed.pdfIn PDF document text
    • http://brlairport.com/images/file/2004917841.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107270218324814.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/70961500214.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/kedafezubudepobojipa.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2e53d803---71379762288.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/bitubuzasavaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+makes+you+unique+interview+answerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 17452 bytes
SHA-256: 344b20b09df65452a83d90dc9bb4ae9edb5e6865e60272e472bdb78bd77a2692
font_02_sfnt_off000125cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CF 10924 bytes
SHA-256: bda9cd2b20a199ce6467a91362a38bc8d321f6cbe1983af40e6120ea7eabe0f7
font_03_sfnt_off00013f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F03 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832

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