Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedc6db07cebce84…

MALICIOUS

PDF

81.4 KB Created: 2021-03-27 14:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 055992124dcbd20a769068fb820dfeef SHA-1: debfa655086451334b94740aaefffae4d8670427 SHA-256: eedc6db07cebce84e537eadb62339ba5725d152c2681ee8f9c9dcd40fd170c35
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including suspicious domains like 'creamwalls.space' and 'katermore.ru', suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://xajibur.ru/award?keyword=caselet+di+pdf+ibps+guide PDF link annotation
    • http://creamwalls.space/jukubagawexukuxewegynf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_600d98554e0e3.pdfIn PDF document text
    • http://katermore.ru/income_guideline_for_medicare_extra_helpngyx9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_600da6d872661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fd8504c903f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_600de3bdc83db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497078/normal_5ffeb20247a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_604704a67de23.pdfIn PDF document text
    • http://comp-arenda.site/hayward_aqua_rite_salt_system_troubleshooting39s3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_6054c8deabfaf.pdfIn PDF document text
    • http://prodit.space/excel_graphique_axe_secondaires22kc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454047/normal_5ff47a70848f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_60254fca13374.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fedeaea0eb77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482002/normal_5fd0f3890a639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6058ea6e2203c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/41742230247.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_43fc2f4184be40558df53f7225c6b0a1.pdf?index=trueIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_afed79baadae4924b0a1ebaddcb3a6d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/verirejon/korg_sv1_73_bag.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://scripts.sil.org/OFLIn 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_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 5156 bytes
SHA-256: c22d4f94619948b3385deb31f8501efe0a56d235fadde6758c0db8d33bb5eccd
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 10832 bytes
SHA-256: 8d19e1ac58daa869944fa4065a4935c1650f44751e788684b85fa3dd1c341506
font_02_sfnt_off00012302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449