Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e62dbdba2060b84…

MALICIOUS

PDF

83.4 KB Created: 2021-09-13 08:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 359e0aedff68ef04d991b37c870b768b SHA-1: 3cc32181c937d1183678baaff2da493de131a7a4 SHA-256: 6e62dbdba2060b842b2c23ae5d517e21ce7cc7c26797aaafca2c061883698dfb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, identified as a link farm. The presence of 'utm_term_redirector=True' and the high number of distinct hosts suggest a phishing or malware distribution attempt. ClamAV detection and ML classification further support the malicious verdict. No scripts were extracted, but the structure indicates a malicious document likely intended to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://media-production.net/admin/ckfinder/userfiles/files/pabonuwokomitusaribakete.pdf In PDF document text
    • https://visualmotion.nl/uploads/file/patasamogukikakik.pdfIn PDF document text
    • http://hbaoge.com/upload/files/54738375041.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/kudolipukexud.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/xolelojejuxuwasew.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/zeluwatatuma.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/88158048484.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/fadixowexepen.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16139f525d5369---ginewirovapajib.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a35f301052a26c942e4719d935ef1110/24481621254.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/45399872106.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/luzevoxixit.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/29468717101.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/terabetamafuwume.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/nodoverenudofim.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/84276984251.pdfIn PDF document text
    • http://scantech3d.com/files/60214227289.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/jidasorowibesazeg.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/90203511285.pdfIn PDF document text
    • https://blokhol.com/upload/files/tigomokexeburos.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/96691503727.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/84170380816.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/dizikinufabeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=magical+gatling+bubble+shooterPDF 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_off0000de5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 18188 bytes
SHA-256: f8c0c1cbd0ff38441e7a41586486fea15850c946699e3cf6e5e5524d9e2d0eae
font_02_sfnt_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 10740 bytes
SHA-256: 3b9c8c1058372613de877271caea140e0fd785913f1deea8ac59be4440764332