Malicious PDF — malware analysis report

Static analysis result for SHA-256 df26fc43fa913de0…

MALICIOUS

PDF

78.9 KB Created: 2021-09-19 13:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 871b1ba2139291dc37b14ce9906f0b6e SHA-1: 383a0d1d9db885537b422f97b0ddc3045c8a1906 SHA-256: df26fc43fa913de012f04363f4d0274d4938eaf0a9bf718091271bdecba7d597
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are associated with compromised content management systems or disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://coretry.ru/uplcv?utm_term=v1v+lol+unblocked PDF link annotation
    • http://ville-dammarie.com/ckfinder/userfiles/files/16318247273.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/dd5cbd151688ef33b0fbfee5f7ab71eb/mikadup.pdfIn PDF document text
    • http://placc.info/up_image/17575309721.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/zojoresinisukekokosa.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/33193920524.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/88351109690.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/2462979300.pdfIn PDF document text
    • https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/59956467001.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210914191725.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/fidagunimeg.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd88724c2e---59202847089.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/120ddad5cf114dd321ec6240e10e94eb/31996090209.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/xuzepifisisatusizipiwet.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/magupupubat.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/73934940692.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/kuwipigipexivosib.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4c09be60563e592f3dec84e8b2dafde5/pufugozakibikexuxuwak.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090522463126.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/m256apcuif1l3ittd3uivpg582/52395517903.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/89507119596.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/zavule.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/nepolozajo.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135163047724---53005667433.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_off0000cf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 10164 bytes
SHA-256: 666f96664f5b589d219016c5fab98a6cf31c1891cd40402c5c0face8e5921122
font_02_sfnt_off0000fe80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 18040 bytes
SHA-256: 30ca20c702f12db592b906a9254410391ca3f99c37ed04e9fed88abddf58b307

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