Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2a68e5e99db43e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-03 01:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 338dd7c8a8c50f788d39bf9f0d26965b SHA-1: 22bf277df5c3c030ba5599d116460e1713d3a91c SHA-256: 2e2a68e5e99db43e0d7ef76422ac015d3b4f0d06c274d4224bcfea51d4aa7830
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and exhibits characteristics of a link farm. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/aws?utm_term=bole+chudiya+song++mr+jatt PDF link annotation
    • http://wowuzarupi.iblogger.org/95264124892.pdfIn PDF document text
    • http://rajedat.iblogger.org/digital_marketer_value_journey_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe024ebb89b6.pdfIn PDF document text
    • http://santaparker.store/16403300888mskps.pdfIn PDF document text
    • http://stickerrus.ru/piggy_roblox_jigsaw_puzzlelzs3m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_60193055081a9.pdfIn PDF document text
    • http://makedctl.site/jegefib9mo4t.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
    • http://rifesos.epizy.com/urine_culture_coliform.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/muteneligeje.pdfIn PDF document text
    • http://wuriwafu.epizy.com/vedevuzaxanon.pdfIn PDF document text
    • http://zalinejogimi.rf.gd/39323170823.pdfIn PDF document text
    • http://dimaninerif.rf.gd/jawowebupikezakofudup.pdfIn PDF document text
    • http://tisuvelepep.rf.gd/garnier_sheet_mask_for_oily_skin.pdfIn PDF document text
    • http://nakepusejedub.epizy.com/susogarabetuzivim.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/bookworm_adventures_2_free_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/livro_capites_de_areia_em.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/armed_heist_apk_mod_1._1._17.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E5 5464 bytes
SHA-256: 900d3eb827e50c6cab70e57f47fe005e7502dbedcd84290a1333bffa3f257f42
font_01_sfnt_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 11844 bytes
SHA-256: 306c6f366c56b5738ca4a1bd64aa7a99dc1fc2b12cb0c0f81322860aae0b88d8
font_02_sfnt_off00011b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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