Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef2c3e5897b23ce…

MALICIOUS

PDF

74.0 KB Created: 2021-03-25 13:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e2a23116241c7a937f0cba9e3719e836 SHA-1: f8d70afdf33fc6c98700d18788ff803f05aadaaa SHA-256: fef2c3e5897b23cedb5a3a5193458fb149e8f9182a9260792e525cf3869d3520
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 ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, with a primary external URI pointing to 'https://jumiwimov.ru/wix?keyword=personalized+wooden+beer+stein', suggesting a phishing or malware distribution lure. The presence of many distinct hosts and links indicates a link farm designed to obscure the ultimate destination.

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://jumiwimov.ru/wix?keyword=personalized+wooden+beer+stein PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370996/normal_5fdfdbd6829a5.pdfIn PDF document text
    • http://vezagoxutejoza.66ghz.com/belutikupifafako.pdfIn PDF document text
    • http://dokisiz.iblogger.org/87354733676.pdfIn PDF document text
    • http://fresh-ita.space/kupikexi2b66p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60174e0d305c5.pdfIn PDF document text
    • http://peuer.xyz/962400241719nsfv.pdfIn PDF document text
    • http://xekokikimelaf.iblogger.org/creative_writing_for_dummies_free.pdfIn PDF document text
    • http://mebotus.mypressonline.com/cambridge_collocation_dictionary_free_download.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/59815815921.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5fed908705015.pdfIn PDF document text
    • http://bumufirila.mygamesonline.org/hex_head_bolt_dimensions.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://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_6e93bf3612374e1fb6bb44e615fb84be.pdf?index=trueIn PDF document text
    • http://xobibaga.myartsonline.com/the_nag_hammadi_scriptures.pdfIn PDF document text
    • http://gateguka.epizy.com/fijakapopumosegonibobifox.pdfIn PDF document text
    • http://tiroteta.rf.gd/music_and_movement_for_preschoolers_lesson_plans.pdfIn PDF document text
    • http://jorasixu.myartsonline.com/57176503848.pdfIn PDF document text
    • http://wawutanow.epizy.com/grammar_multiple_choice_test_worksheets.pdfIn PDF document text
    • http://lubejenaje.rf.gd/97473807123.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_0cb0842f467142c2884619b1d38410a4.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_off0000d450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD450 4892 bytes
SHA-256: 050b624ade0a9f56c6c8b4f3f89cdd12f7c944a540f6ee98000247c1ed03d89a
font_01_sfnt_off0000e506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 11564 bytes
SHA-256: 689854d6a791793c87458151f016f315b776ffecc228c25dfc54603e371aa0d2
font_02_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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