Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b098e621b53b9d3…

MALICIOUS

PDF

93.2 KB Created: 2021-02-28 19:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 30cb031dff568578e84853cd1eb3977d SHA-1: 7e7a197d5a4f4707059c4a6c11b1e6cc48014aef SHA-256: 3b098e621b53b9d3b1843edc617ebd4a5667c7eade0c99cf4d73f4613f8e439f
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the PDF as malicious. The document body, though heavily obfuscated, appears to be a lure for a tuning guide, likely to trick users into clicking the malicious link. The presence of password-protected archive lures suggests a multi-stage attack where the actual payload is hidden.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://yafferge.ru/wix?keyword=gran+turismo+6+tuning+guide+deutsch In PDF document text
    • http://wivaserana.mywebcommunity.org/chapter_2_test_chemistry_of_life.pdfIn PDF document text
    • http://pimadukemaxi.22web.org/kafixefapuralafazetopif.pdfIn PDF document text
    • http://1cats.space/govuroradovajevrmxh.pdfIn PDF document text
    • http://supportcopyright.net/adventism_in_zambiarifsh.pdfIn PDF document text
    • http://cccckkkkkdd.space/32014041737io7ej.pdfIn PDF document text
    • http://sis-paypal.com/tunilibugomezigagopexotebzil6n.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/jofoziv.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/purabuvawofemanosedeludar.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/black_and_decker_iron_model_d2030_manual.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/nozixagifoxivowakamovoku.pdfIn PDF document text
    • http://jakor.pro/mewivumiburuvotosoboxt36vh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofodas.rf.gd/91606463727.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/volume_booster_ios.pdfIn PDF document text
    • http://posijibanif.epizy.com/remetu.pdfIn PDF document text
    • http://toguxekedufu.epizy.com/kewemuwigoxiviwuzet.pdfIn PDF document text
    • http://nivemegasewokem.rf.gd/wrong_turn_3_video.pdfIn PDF document text
    • http://zigexejumex.epizy.com/86228730518.pdfIn PDF document text
    • http://ziradisam.rf.gd/wumimexosufilivi.pdfIn PDF document text
    • http://fewajun.epizy.com/lapadunebatakev.pdfIn PDF document text
    • http://limizepafut.epizy.com/coffee_table_book_layout_templates.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FC 5504 bytes
SHA-256: b0d1b0700c07dfcf92f6ede854e1a5a4d1d3eeea72b81cad9eaa8601c94a2819
font_01_sfnt_off00014381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14381 10412 bytes
SHA-256: e64c2b2c78600a5045220ec1e6c3867f3eb8204df3a957d112da2b9e5561dfbc

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