Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cb8d3fb6a6d157…

MALICIOUS

PDF

97.6 KB Created: 2021-06-11 19:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b574100e95a56ad09016a63f5370978 SHA-1: f239ad14f2b281bc07c0716a3a8a34053a45ff5a SHA-256: e0cb8d3fb6a6d1572dcb2884272a53bd721a6ccb606e696db87043777fc3fceb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • 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/pbw?utm_term=doraemon+kachi+kochi+full+movie PDF link annotation
    • https://zikazofikadit.weebly.com/uploads/1/3/0/7/130739129/gulibubojepiz.pdfIn PDF document text
    • https://rakomuditopag.weebly.com/uploads/1/3/4/7/134717505/dewawevabefitev-kenuwotisovuse-vurifonekoviga.pdfIn PDF document text
    • https://rugufixib.weebly.com/uploads/1/3/4/3/134381394/rimomumata.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/7185273.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/7367997.pdfIn PDF document text
    • https://posuxosovovenev.weebly.com/uploads/1/3/4/5/134593520/pemubalugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_604ceccf37906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495849/normal_60bd582c7654f.pdfIn PDF document text
    • https://giginepa.weebly.com/uploads/1/3/4/3/134389182/litumovosutuje-kamesife.pdfIn PDF document text
    • https://kagixopobexumel.weebly.com/uploads/1/3/4/6/134648921/riwoxosuwage-ligegikoso-fotexumazabax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88f2c13-380b-49e6-bffc-2ca790b6dbd4/zorizunupafakejevizagev.pdfIn PDF document text
    • http://gitizuxob.pbworks.com/f/2021_calendar_printable_with_holidays.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd689ec5-b2d4-4798-8bb1-03780a5c32b5/fifeburuwisunipaxavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c42bd6-0542-4447-8868-3fa8090b8a62/feniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40173aab-7922-4ea2-875d-787085cc2c84/what_are_human_trials.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144590235/torib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57fbcb77-a7fb-4ba4-8679-101f6a22b482/83747796358.pdfIn PDF document text
    • http://vesusezipuwe.pbworks.com/f/59507192291.pdfIn PDF document text
    • http://disisopaz.pbworks.com/f/program_samsung_tv_remote_aa59.pdfIn PDF document text
    • http://kemususi.pbworks.com/f/hollywood_war_movies_dubbed_in_tamil_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a1512e-8c96-453b-b755-1ef3ac56ea83/24286903655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27112742-f8f3-4504-ac72-343d0c7f1644/gofivorola.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D1 5420 bytes
SHA-256: 86fe217cafe4c39f32a0256067e38dfb00db78b558dae24dcbeb155fb05ccd43
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 4868 bytes
SHA-256: 639232096b7e8e20f86216de011bbbb755768894d5ac9eeeb168f0f4693684f1
font_02_sfnt_off00010d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D12 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_03_sfnt_off00011cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF3 11440 bytes
SHA-256: 425aeb4b7fc5f015359cbf2dc9752e421182edaa50e9d53c93e7921d41dc19e3
font_04_sfnt_off00014390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14390 17112 bytes
SHA-256: 8d931078a8bda077e62b6226989e9ca7a204b5b2ded984cec863dfc844f848f3
font_05_sfnt_off00015bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_06_sfnt_off000169f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F5 2832 bytes
SHA-256: a12908a88df35a7e9eb57470e9a94a806bb52df392ce88a62d07cba2b79b9044

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