Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07ec1f94189fb49…

MALICIOUS

PDF

77.2 KB Created: 2021-09-14 08:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4c9fd6a7a6a616b89ff4b0bf72bc023b SHA-1: 274adfae338c772aae6568b54ef3317a5a280ac9 SHA-256: a07ec1f94189fb49611868db908b5a7e000ff57e6c154d9ed3176c32aff99f74
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://showplus.ae/userfiles/files/26405776976.pdf In PDF document text
    • https://profession-your-dr.com/uploads/files/202109061755585915.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sikuliwivuvifexepofe.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/gidazidositawesodizat.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/simuxabigola.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/dozeg.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/98445794111.pdfIn PDF document text
    • http://carbontuning.ru/file/netazisowewaku.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109041009564426.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/lakoxefifedonowaniwo.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/bodiweroxaguziwifokafaku.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/03def3ce3c414774ae1ab2e9ec326c1b/43568452536.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161330550c7012---11070132559.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/81779449cd0ac895a2b7db2d652a244c/gunawegoribupisamokivo.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/xigoxolijejixi.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/nevojejeko.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/zixogusudu.pdfIn PDF document text
    • http://beta-rc.com/upload/files/nuxebujogeje.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/89108544632.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b470ea837a---nazego.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/muxujiloduvorejum.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/medorajil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mario+party+3+n64+downloadPDF 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_off0000c8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 10696 bytes
SHA-256: 23285a4d1fa7ac2cc06f553f70a00ac67b7e17022039572091122688159fecae
font_02_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 17448 bytes
SHA-256: 4ad1d1eca0c521168ba542fab1f712768d4eda6a08116779c9d6d08780562ead