Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe01c3ad0b815bf0…

MALICIOUS

PDF

74.5 KB Created: 2021-09-07 01:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 321abb911a56bfd5b4fa9306f9c71d0d SHA-1: 7deced6f0d7e83b9668eb8e72c2b88c54d3e7e69 SHA-256: fe01c3ad0b815bf04909448436b2df0df0b02e4df8a4ce60ef28af3a0cc6073a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Numerous heuristics indicate the presence of a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://krisoc.ru/uplcv?utm_term=dishwashing+liquid+ingredients+pdf PDF link annotation
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfd08e26c6---zexos.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/ravewutinaperewirino.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b309ccd6e0b---jubumepidetibuvowa.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/32374294646.pdfIn PDF document text
    • http://hkacca.com/userfiles/31257210858.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/28294710847.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210813043014.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c7a9509c5---44193658434.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/9620840088.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/pofumowadabuwaxupo.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/67920321256.pdfIn PDF document text
    • https://tl-systems.hu/files/files/jixilunumivevibi.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e6a92f96b---bibobatafivixeferesu.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/kojevudegolawilufokilov.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f1da5525---pedoxujevetusudopozan.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/43462631454.pdfIn PDF document text
    • https://amgaa.org/temp//files/lifeduvuxidef.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/13803298209.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/lemul.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/lexuzepinevesovaze.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9d5e4d36---28661938990.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/rawobumegubazewevadoxi.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080d4ea9d7ee---71585396419.pdfIn PDF document text
    • 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_off0000c0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 16528 bytes
SHA-256: 481ea50dfd843f3b302e009236f9d048138d732aa98e3b1132b7b3513f173afe
font_02_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 10988 bytes
SHA-256: 0f6418188e93fae8dc56dbf2aef325e2d6a19228b51343ffca8424ad86d22235

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