Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74c0f37a75cb42e…

MALICIOUS

PDF

81.7 KB Created: 2021-10-10 18:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2b4a0bc78fc0dfd274c5e18a9e563b2f SHA-1: 28b278dcdcece4a61ad3ea8249a4bb9672925953 SHA-256: e74c0f37a75cb42e598a04c54e50d18adcda6021241fd01325b2cd9fc1327bb7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=famous+celebrities+from+tennessee PDF link annotation
    • https://bulendengin.com/upload/ckfinder/files/fipevamusajabodalixib.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/fb707e8ae891fc28d536235f594535cb/8097773179.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/zafanujozemajebukogixeko.pdfIn PDF document text
    • https://olterus.org/contents/files/81563253811.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/mazizagalegalami.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/xerijijajozinenozovelabi.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3814e430d2a80fd536456e1256ba673f/zamokaxameguredix.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/kibejafemegun.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/mejorelikinupakinomufafo.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/79317568232.pdfIn PDF document text
    • http://feminella.ro/upload/fck/webipekilin.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/xobawosivovixajajalugus.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/27413230058.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/kipolikaxatiju.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/miriz.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/mujafibekafewamufo.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/kurosateberipenewaruta.pdfIn PDF document text
    • https://pu.vienhung.com/webroot/img/files/reduxoloro.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/datupisojavabozoku.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/xogivew.pdfIn PDF document text
    • https://nordiskvillaventilation.dk/userfiles/file/gekuv.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/razevulipiv.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_off0000d659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD659 19336 bytes
SHA-256: 2ed73c0601720bdbda61b659d18cc9e1ba9ce64e13d4d43c748c33b2f80a7048
font_01_sfnt_off00010866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10866 10712 bytes
SHA-256: 33e1f95c5847bce85a39839548218fc254215e8a80fbed13bcd7ae87f65f20c8
font_02_sfnt_off000120ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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