Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ce6edfa0616826…

MALICIOUS

PDF

80.1 KB Created: 2021-03-28 18:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2512801c5b310d60a36387c4a70f235f SHA-1: bc36d67944ca4148008f774ccc85d649ecafbac7 SHA-256: 74ce6edfa06168262cffeba3767e450c5fba85c8331f41f728f5e435339130d7
184 Risk Score

Malware Insights

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

The PDF contains embedded links to malicious infrastructure, specifically identified as a redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'society bye laws pdf' which serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://dafemum.ru/award?keyword=society+bye+laws+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_60601ef470f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_603874e29973d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_604ddbd139612.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/witipisexegolukagevu.pdfIn PDF document text
    • http://buzofenag.22web.org/45788672446.pdfIn PDF document text
    • http://pawarelubasiwu.iblogger.org/51783097487.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/17971842214.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/LegjhaO/pevizegazawaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_603e59f24fb0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5ffa43760dd03.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/jjdkiib/91405167076.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://vamovatalugoja.epizy.com/rokarovagavitilamekopiwez.pdfIn PDF document text
    • http://wujagikaximamis.rf.gd/kabofutam.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/massey_ferguson_35_diesel.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_1f7e0d5d63204f7c94b14509197134da.pdf?index=trueIn PDF document text
    • http://daripesobad.epizy.com/98195116792.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_d836f1239fb24c3382eb2630005132f6.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_54bf0e6417d14a10becc4862ed363aed.pdf?index=trueIn PDF document text
    • http://wotanuxofewaru.rf.gd/kasewipuzebupa.pdfIn PDF document text
    • http://fuxopipojuwepi.epizy.com/gijozupezepu.pdfIn PDF document text
    • http://tuwoboga.epizy.com/algebra_2_notes.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_ae719c245eef4646bf5eea08cbad13f2.pdf?index=trueIn 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_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 5172 bytes
SHA-256: e68a392ade472540e539c7fc27e0539abbde8e00ea62feaf799eda8cb139fca2
font_01_sfnt_off0001014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 10360 bytes
SHA-256: dbf68cd241b6691bd2e7fb2a089676672f54267cc0fdeaff14802599ea84f60b
font_02_sfnt_off000124b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361