Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f45a3405721840…

MALICIOUS

PDF

90.6 KB Created: 2021-09-10 11:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1c5a69bc05ef088086cd83d66821f68f SHA-1: d953de18050981c24848624cafc56c57a4d36e6b SHA-256: 89f45a34057218409ddc99f969774205da826b2f342cac17d031eceeab68e2bc
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, particularly those with 'utm_term' parameters, further support the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ijtm.in/userfiles/file/98776353147.pdf In PDF document text
    • http://ccswcd.com/userfiles/file/pizib.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/70746095302.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e82d1aa94cde72c8c58c12a13100935b/84440975953.pdfIn PDF document text
    • http://juncheng.tw/upload/files/jutiriwu.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/gipawixetefinavub.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b1b743bcbae576a35373f870ac69d56d/vibuzibetiza.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/56439458471.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/46040534317.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/5735060468.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/tukowa.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/nunan.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/12464217304.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/88520184805.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/46309407125.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/suxanuxupezopaxuburafak.pdfIn PDF document text
    • http://horvathortho.hu/tmp/55149892778.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/35495051071.pdfIn PDF document text
    • http://bptramptour.pl/files/file/53728839615.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/651ff052db473483bf027641c5ca7f3d/38224811005.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135eb1994e8d---24496696668.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/72511019801.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vnmuekj8qda324gciri9nbt6l2/29505897559.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/nununubug.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/26537630380.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=wells+fargo+android+applicationPDF 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_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 10788 bytes
SHA-256: d7f8923e5fc305a22116bd022b9f27dc6f479cee5ee1832d11d651887845f814
font_01_sfnt_off00011400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11400 18532 bytes
SHA-256: 826cef62babfb60ec3d4849b2a542d2c4f54a65a280c6fa2e9e0454d8fd1e144
font_02_sfnt_off0001443a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1443A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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