Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa95789fbcb40fe…

MALICIOUS

PDF

82.5 KB Created: 2021-02-16 16:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4669413ffdaf2839c390dd683b9272be SHA-1: 3eb5a607303f8861d2c98f51812210020dbf5ef1 SHA-256: eaa95789fbcb40fec711d6f0e1e521327153b2ea78e3e92456dd8d24a7914c7d
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a malicious redirector link farm. The primary malicious URL identified is 'https://crophysi.ru/wix?keyword=shaista+wahidi+first+husband+death'. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=shaista+wahidi+first+husband+death In PDF document text
    • https://lebipogife.weebly.com/uploads/1/3/5/9/135990957/linenokewusoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_601a643f19c2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375698/normal_5fe5fd451c0d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5fc763b1de3e5.pdfIn PDF document text
    • http://meetsucre.pro/8977572330824qr3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5fcfef7ed39c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_600a9c6421d60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487916/normal_5fdf058737bc7.pdfIn PDF document text
    • http://craftsmansmetics.com/33679739441edtgt.pdfIn PDF document text
    • http://uplrezina.site/197449230441n17y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_5fd77dae904e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bipepezuwed/fenimemabibutugubuxejoke.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/tableaux_parisiens_baudelaire.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/i_dreamed_a_dream_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/28917165040.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/caesar_2_pc_game_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6B 5072 bytes
SHA-256: efcbb210f53c84949a6e14bc646926d7f2b505cdabab4765f7b610a13c6d821a
font_01_sfnt_off0000f099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF099 10768 bytes
SHA-256: 7803c893b12f3fd705731c6e8365d106eb7c727921cf0a15bf2693f86f0df222
font_02_sfnt_off000114d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D4 17352 bytes
SHA-256: 069a12372117c3a65ec10b16af420fa339d2c0c4e5f6fdd2802b27ad42857f08
font_03_sfnt_off00012e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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