Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d414ea28de54203…

MALICIOUS

PDF

79.0 KB Created: 2021-09-18 10:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2cbf22a9709f948212d9141d527eff63 SHA-1: 42ba8258b53ab2621652f79d3f14795b4655d252 SHA-256: 8d414ea28de542038c38316ea38233d12b43856028925a8382821aaa617069a5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits multiple high-risk heuristics indicative of phishing and potential credential harvesting. The presence of MFA lures and payment redirection lures strongly suggests an attempt to trick users into divulging sensitive information or authorizing fraudulent transactions. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious workflow, likely involving exploitation or redirection to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+play+multiple+accounts+on+clash+of+clans PDF link annotation
    • http://medicapoland.pl/uploaded/file/dedebagafisasevan.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/8499899625.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/e10e74027bc235f93e810de771562c37/wasegakowadiral.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/18644863112.pdfIn PDF document text
    • http://afro-safari.com/upload/files/voruf.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/83969970125.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/jiluw.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210908_185123.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/63832740850.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/10499227450.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/96027510641.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/diginifubizojeminatuzos.pdfIn PDF document text
    • https://seerupit.dk/assens/file/45892380814.pdfIn PDF document text
    • http://abworder.com/uploads/files/14205147387.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210902052116.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/56907112633.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/poravetopegel.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/32456928602.pdfIn PDF document text
    • http://amirmazandaranihospital.com/ckeditor/files/files/45381590372.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/2163051639.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/guxagikusuz.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/kapupisaro.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_off0000ceac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 10936 bytes
SHA-256: 42236c9827093fde5cc80694648cefb6ed88e7e522e6d283891353d3dc40f2f7
font_02_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 17900 bytes
SHA-256: 6bcd77fafa9d28a633b6d342a217abd6fdf7f357f9d0178122556a76c6f8635f