Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be2fea7895b905a…

MALICIOUS

PDF

97.0 KB Created: 2021-06-09 23:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7dd4679ccaf93b992797b31fa5072dd2 SHA-1: 33c4f8bfc8d69a413155b24207edf5c4635778fa SHA-256: 9be2fea7895b905a9f477037e0817020670e8490f3787aa54e5b5358c6a6ab47
126 Risk Score

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 or trojan variant. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting an attempt to obscure the final malicious destination. The document body, though heavily obfuscated, contains a title that appears to be a lure, and the presence of external URIs indicates an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://medvor.ru/pbw?utm_term=song+lord+you+are+good+and+your+mercy+endureth+forever PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371508/normal_60033727deddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_606624b98c417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_606cbcfa90a9e.pdfIn PDF document text
    • https://doliwalesi.weebly.com/uploads/1/3/0/7/130776147/limesose_lidinewarabuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_60392d1f89d6d.pdfIn PDF document text
    • https://dezojase.weebly.com/uploads/1/3/4/7/134711134/regoduja.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://fozujedax.pbworks.com/f/bomeje.pdfIn PDF document text
    • http://domewisisu.pbworks.com/w/file/fetch/144924999/13783062366.pdfIn PDF document text
    • http://mejigulo.pbworks.com/f/40603884010.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144634209/kumelidudimodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ef71af-04e3-45cb-b232-6c259017c3bb/buwisilojarevizolajutop.pdfIn PDF document text
    • http://ridelox.pbworks.com/f/java_jre_9_0_1.8_0_151_download.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144456612/citizen_eco-drive_radio_controlled_perpetual_calendar_wr200_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95a718e-1370-4ad7-b644-a087096e378d/kafowisefowukapa.pdfIn PDF document text
    • http://zexowisam.pbworks.com/f/is_r6_insulation_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce4305f-0d4b-4336-a9ae-c997ab245843/flowers_for_algernon_theme_handout.pdfIn PDF document text
    • http://depowota.pbworks.com/w/file/fetch/144864882/93282811170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba347614-21cf-47d6-8b71-7f1b8200d7da/81065007229.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B7 4692 bytes
SHA-256: e231c594c4de2d4e1b0eca21e6c48cac99fd2090f36b31d91203a8bf27c62815
font_01_sfnt_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 5356 bytes
SHA-256: cb52302b23c9483a812720be6ffdd5a00a644a3dd5e004bda1e02b88dc2ac4fa
font_02_sfnt_off0001295d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295D 12568 bytes
SHA-256: e47595eef33a44d6969796dd6632dcce2240fdadfd98f75bbac96b082539add0
font_03_sfnt_off0001525e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525E 16132 bytes
SHA-256: 60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd
font_04_sfnt_off00016751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16751 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333